diff --git a/dlls/ddraw/ddraw.c b/dlls/ddraw/ddraw.c
index d9515257049..3ce18db35bb 100644
--- a/dlls/ddraw/ddraw.c
+++ b/dlls/ddraw/ddraw.c
@@ -3700,7 +3700,7 @@ static HRESULT WINAPI ddraw7_CreatePalette(IDirectDraw7 *iface, DWORD Flags,
         PALETTEENTRY *ColorTable, IDirectDrawPalette **Palette, IUnknown *pUnkOuter)
 {
     struct ddraw *ddraw = impl_from_IDirectDraw7(iface);
-    IDirectDrawPaletteImpl *object;
+    struct ddraw_palette *object;
     HRESULT hr;
 
     TRACE("iface %p, flags %#x, color_table %p, palette %p, outer_unknown %p.\n",
@@ -3719,8 +3719,8 @@ static HRESULT WINAPI ddraw7_CreatePalette(IDirectDraw7 *iface, DWORD Flags,
         return DDERR_NOCOOPERATIVELEVELSET;
     }
 
-    object = HeapAlloc(GetProcessHeap(), 0, sizeof(IDirectDrawPaletteImpl));
-    if(!object)
+    object = HeapAlloc(GetProcessHeap(), 0, sizeof(*object));
+    if (!object)
     {
         ERR("Out of memory when allocating memory for a palette implementation\n");
         wined3d_mutex_unlock();
@@ -3755,7 +3755,7 @@ static HRESULT WINAPI ddraw4_CreatePalette(IDirectDraw4 *iface, DWORD flags, PAL
     hr = ddraw7_CreatePalette(&ddraw->IDirectDraw7_iface, flags, entries, palette, outer_unknown);
     if (SUCCEEDED(hr) && *palette)
     {
-        IDirectDrawPaletteImpl *impl = impl_from_IDirectDrawPalette(*palette);
+        struct ddraw_palette *impl = impl_from_IDirectDrawPalette(*palette);
         IDirectDraw7_Release(&ddraw->IDirectDraw7_iface);
         IDirectDraw4_AddRef(iface);
         impl->ifaceToRelease = (IUnknown *)iface;
@@ -3775,7 +3775,7 @@ static HRESULT WINAPI ddraw2_CreatePalette(IDirectDraw2 *iface, DWORD flags,
     hr = ddraw7_CreatePalette(&ddraw->IDirectDraw7_iface, flags, entries, palette, outer_unknown);
     if (SUCCEEDED(hr) && *palette)
     {
-        IDirectDrawPaletteImpl *impl = impl_from_IDirectDrawPalette(*palette);
+        struct ddraw_palette *impl = impl_from_IDirectDrawPalette(*palette);
         IDirectDraw7_Release(&ddraw->IDirectDraw7_iface);
         impl->ifaceToRelease = NULL;
     }
@@ -3795,7 +3795,7 @@ static HRESULT WINAPI ddraw1_CreatePalette(IDirectDraw *iface, DWORD flags,
     hr = ddraw7_CreatePalette(&ddraw->IDirectDraw7_iface, flags, entries, palette, outer_unknown);
     if (SUCCEEDED(hr) && *palette)
     {
-        IDirectDrawPaletteImpl *impl = impl_from_IDirectDrawPalette(*palette);
+        struct ddraw_palette *impl = impl_from_IDirectDrawPalette(*palette);
         IDirectDraw7_Release(&ddraw->IDirectDraw7_iface);
         impl->ifaceToRelease = NULL;
     }
diff --git a/dlls/ddraw/ddraw_private.h b/dlls/ddraw/ddraw_private.h
index f34b1f71e9b..87fa43bd8cc 100644
--- a/dlls/ddraw/ddraw_private.h
+++ b/dlls/ddraw/ddraw_private.h
@@ -41,7 +41,6 @@ extern const struct wined3d_parent_ops ddraw_surface_wined3d_parent_ops DECLSPEC
 extern const struct wined3d_parent_ops ddraw_null_wined3d_parent_ops DECLSPEC_HIDDEN;
 
 /* Typdef the interfaces */
-typedef struct IDirectDrawPaletteImpl     IDirectDrawPaletteImpl;
 typedef struct IDirect3DDeviceImpl        IDirect3DDeviceImpl;
 typedef struct IDirect3DLightImpl         IDirect3DLightImpl;
 typedef struct IDirect3DViewportImpl      IDirect3DViewportImpl;
@@ -370,7 +369,7 @@ struct ddraw_clipper *unsafe_impl_from_IDirectDrawClipper(IDirectDrawClipper *if
 /*****************************************************************************
  * IDirectDrawPalette implementation structure
  *****************************************************************************/
-struct IDirectDrawPaletteImpl
+struct ddraw_palette
 {
     /* IUnknown fields */
     IDirectDrawPalette IDirectDrawPalette_iface;
@@ -382,14 +381,14 @@ struct IDirectDrawPaletteImpl
     IUnknown                  *ifaceToRelease;
 };
 
-static inline IDirectDrawPaletteImpl *impl_from_IDirectDrawPalette(IDirectDrawPalette *iface)
+static inline struct ddraw_palette *impl_from_IDirectDrawPalette(IDirectDrawPalette *iface)
 {
-    return CONTAINING_RECORD(iface, IDirectDrawPaletteImpl, IDirectDrawPalette_iface);
+    return CONTAINING_RECORD(iface, struct ddraw_palette, IDirectDrawPalette_iface);
 }
 
-IDirectDrawPaletteImpl *unsafe_impl_from_IDirectDrawPalette(IDirectDrawPalette *iface) DECLSPEC_HIDDEN;
+struct ddraw_palette *unsafe_impl_from_IDirectDrawPalette(IDirectDrawPalette *iface) DECLSPEC_HIDDEN;
 
-HRESULT ddraw_palette_init(IDirectDrawPaletteImpl *palette,
+HRESULT ddraw_palette_init(struct ddraw_palette *palette,
         struct ddraw *ddraw, DWORD flags, PALETTEENTRY *entries) DECLSPEC_HIDDEN;
 
 /* Helper structures */
diff --git a/dlls/ddraw/palette.c b/dlls/ddraw/palette.c
index 1d66db30e89..7d879ad3b10 100644
--- a/dlls/ddraw/palette.c
+++ b/dlls/ddraw/palette.c
@@ -37,10 +37,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
  *  S_OK on success
  *  E_NOINTERFACE if the requested interface wasn't found
  *****************************************************************************/
-static HRESULT WINAPI
-IDirectDrawPaletteImpl_QueryInterface(IDirectDrawPalette *iface,
-                                      REFIID refiid,
-                                      void **obj)
+static HRESULT WINAPI ddraw_palette_QueryInterface(IDirectDrawPalette *iface, REFIID refiid, void **obj)
 {
     TRACE("iface %p, riid %s, object %p.\n", iface, debugstr_guid(refiid), obj);
 
@@ -67,10 +64,9 @@ IDirectDrawPaletteImpl_QueryInterface(IDirectDrawPalette *iface,
  *  The new refcount
  *
  *****************************************************************************/
-static ULONG WINAPI
-IDirectDrawPaletteImpl_AddRef(IDirectDrawPalette *iface)
+static ULONG WINAPI ddraw_palette_AddRef(IDirectDrawPalette *iface)
 {
-    IDirectDrawPaletteImpl *This = impl_from_IDirectDrawPalette(iface);
+    struct ddraw_palette *This = impl_from_IDirectDrawPalette(iface);
     ULONG ref = InterlockedIncrement(&This->ref);
 
     TRACE("%p increasing refcount to %u.\n", This, ref);
@@ -87,10 +83,9 @@ IDirectDrawPaletteImpl_AddRef(IDirectDrawPalette *iface)
  *  The new refcount
  *
  *****************************************************************************/
-static ULONG WINAPI
-IDirectDrawPaletteImpl_Release(IDirectDrawPalette *iface)
+static ULONG WINAPI ddraw_palette_Release(IDirectDrawPalette *iface)
 {
-    IDirectDrawPaletteImpl *This = impl_from_IDirectDrawPalette(iface);
+    struct ddraw_palette *This = impl_from_IDirectDrawPalette(iface);
     ULONG ref = InterlockedDecrement(&This->ref);
 
     TRACE("%p decreasing refcount to %u.\n", This, ref);
@@ -126,14 +121,11 @@ IDirectDrawPaletteImpl_Release(IDirectDrawPalette *iface)
  *  DDERR_ALREADYINITIALIZED
  *
  *****************************************************************************/
-static HRESULT WINAPI
-IDirectDrawPaletteImpl_Initialize(IDirectDrawPalette *iface,
-                                  IDirectDraw *DD,
-                                  DWORD Flags,
-                                  PALETTEENTRY *ColorTable)
+static HRESULT WINAPI ddraw_palette_Initialize(IDirectDrawPalette *iface,
+        IDirectDraw *ddraw, DWORD flags, PALETTEENTRY *entries)
 {
     TRACE("iface %p, ddraw %p, flags %#x, entries %p.\n",
-            iface, DD, Flags, ColorTable);
+            iface, ddraw, flags, entries);
 
     return DDERR_ALREADYINITIALIZED;
 }
@@ -152,16 +144,14 @@ IDirectDrawPaletteImpl_Initialize(IDirectDrawPalette *iface,
  *  For more details, see IWineD3DPalette::GetCaps
  *
  *****************************************************************************/
-static HRESULT WINAPI
-IDirectDrawPaletteImpl_GetCaps(IDirectDrawPalette *iface,
-                               DWORD *Caps)
+static HRESULT WINAPI ddraw_palette_GetCaps(IDirectDrawPalette *iface, DWORD *caps)
 {
-    IDirectDrawPaletteImpl *This = impl_from_IDirectDrawPalette(iface);
+    struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
 
-    TRACE("iface %p, caps %p.\n", iface, Caps);
+    TRACE("iface %p, caps %p.\n", iface, caps);
 
     wined3d_mutex_lock();
-    *Caps = wined3d_palette_get_flags(This->wineD3DPalette);
+    *caps = wined3d_palette_get_flags(palette->wineD3DPalette);
     wined3d_mutex_unlock();
 
     return D3D_OK;
@@ -185,24 +175,20 @@ IDirectDrawPaletteImpl_GetCaps(IDirectDrawPalette *iface,
  *  For details, see IWineD3DDevice::SetEntries
  *
  *****************************************************************************/
-static HRESULT WINAPI
-IDirectDrawPaletteImpl_SetEntries(IDirectDrawPalette *iface,
-                                  DWORD Flags,
-                                  DWORD Start,
-                                  DWORD Count,
-                                  PALETTEENTRY *PalEnt)
+static HRESULT WINAPI ddraw_palette_SetEntries(IDirectDrawPalette *iface,
+        DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
 {
-    IDirectDrawPaletteImpl *This = impl_from_IDirectDrawPalette(iface);
+    struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
     HRESULT hr;
 
     TRACE("iface %p, flags %#x, start %u, count %u, entries %p.\n",
-            iface, Flags, Start, Count, PalEnt);
+            iface, flags, start, count, entries);
 
-    if(!PalEnt)
+    if (!entries)
         return DDERR_INVALIDPARAMS;
 
     wined3d_mutex_lock();
-    hr = wined3d_palette_set_entries(This->wineD3DPalette, Flags, Start, Count, PalEnt);
+    hr = wined3d_palette_set_entries(palette->wineD3DPalette, flags, start, count, entries);
     wined3d_mutex_unlock();
 
     return hr;
@@ -225,24 +211,20 @@ IDirectDrawPaletteImpl_SetEntries(IDirectDrawPalette *iface,
  *  For details, see IWineD3DDevice::SetEntries
  *
  *****************************************************************************/
-static HRESULT WINAPI
-IDirectDrawPaletteImpl_GetEntries(IDirectDrawPalette *iface,
-                                  DWORD Flags,
-                                  DWORD Start,
-                                  DWORD Count,
-                                  PALETTEENTRY *PalEnt)
+static HRESULT WINAPI ddraw_palette_GetEntries(IDirectDrawPalette *iface,
+        DWORD flags, DWORD start, DWORD count, PALETTEENTRY *entries)
 {
-    IDirectDrawPaletteImpl *This = impl_from_IDirectDrawPalette(iface);
+    struct ddraw_palette *palette = impl_from_IDirectDrawPalette(iface);
     HRESULT hr;
 
     TRACE("iface %p, flags %#x, start %u, count %u, entries %p.\n",
-            iface, Flags, Start, Count, PalEnt);
+            iface, flags, start, count, entries);
 
-    if(!PalEnt)
+    if (!entries)
         return DDERR_INVALIDPARAMS;
 
     wined3d_mutex_lock();
-    hr = wined3d_palette_get_entries(This->wineD3DPalette, Flags, Start, Count, PalEnt);
+    hr = wined3d_palette_get_entries(palette->wineD3DPalette, flags, start, count, entries);
     wined3d_mutex_unlock();
 
     return hr;
@@ -251,24 +233,24 @@ IDirectDrawPaletteImpl_GetEntries(IDirectDrawPalette *iface,
 static const struct IDirectDrawPaletteVtbl ddraw_palette_vtbl =
 {
     /*** IUnknown ***/
-    IDirectDrawPaletteImpl_QueryInterface,
-    IDirectDrawPaletteImpl_AddRef,
-    IDirectDrawPaletteImpl_Release,
+    ddraw_palette_QueryInterface,
+    ddraw_palette_AddRef,
+    ddraw_palette_Release,
     /*** IDirectDrawPalette ***/
-    IDirectDrawPaletteImpl_GetCaps,
-    IDirectDrawPaletteImpl_GetEntries,
-    IDirectDrawPaletteImpl_Initialize,
-    IDirectDrawPaletteImpl_SetEntries
+    ddraw_palette_GetCaps,
+    ddraw_palette_GetEntries,
+    ddraw_palette_Initialize,
+    ddraw_palette_SetEntries
 };
 
-IDirectDrawPaletteImpl *unsafe_impl_from_IDirectDrawPalette(IDirectDrawPalette *iface)
+struct ddraw_palette *unsafe_impl_from_IDirectDrawPalette(IDirectDrawPalette *iface)
 {
     if (!iface) return NULL;
     assert(iface->lpVtbl == &ddraw_palette_vtbl);
-    return CONTAINING_RECORD(iface, IDirectDrawPaletteImpl, IDirectDrawPalette_iface);
+    return CONTAINING_RECORD(iface, struct ddraw_palette, IDirectDrawPalette_iface);
 }
 
-HRESULT ddraw_palette_init(IDirectDrawPaletteImpl *palette,
+HRESULT ddraw_palette_init(struct ddraw_palette *palette,
         struct ddraw *ddraw, DWORD flags, PALETTEENTRY *entries)
 {
     HRESULT hr;
diff --git a/dlls/ddraw/surface.c b/dlls/ddraw/surface.c
index e58db9d4b75..8fc00e45605 100644
--- a/dlls/ddraw/surface.c
+++ b/dlls/ddraw/surface.c
@@ -4685,9 +4685,9 @@ static HRESULT WINAPI ddraw_surface1_SetColorKey(IDirectDrawSurface *iface, DWOR
 static HRESULT WINAPI ddraw_surface7_SetPalette(IDirectDrawSurface7 *iface, IDirectDrawPalette *Pal)
 {
     struct ddraw_surface *This = impl_from_IDirectDrawSurface7(iface);
+    struct ddraw_palette *palette_impl = unsafe_impl_from_IDirectDrawPalette(Pal);
     IDirectDrawPalette *oldPal;
     struct ddraw_surface *surf;
-    IDirectDrawPaletteImpl *PalImpl = unsafe_impl_from_IDirectDrawPalette(Pal);
     HRESULT hr;
 
     TRACE("iface %p, palette %p.\n", iface, Pal);
@@ -4713,7 +4713,7 @@ static HRESULT WINAPI ddraw_surface7_SetPalette(IDirectDrawSurface7 *iface, IDir
     if(oldPal) IDirectDrawPalette_Release(oldPal);  /* For the GetPalette */
 
     /* Set the new Palette */
-    wined3d_surface_set_palette(This->wined3d_surface, PalImpl ? PalImpl->wineD3DPalette : NULL);
+    wined3d_surface_set_palette(This->wined3d_surface, palette_impl ? palette_impl->wineD3DPalette : NULL);
     /* AddRef the Palette */
     if(Pal) IDirectDrawPalette_AddRef(Pal);
 
@@ -4723,7 +4723,7 @@ static HRESULT WINAPI ddraw_surface7_SetPalette(IDirectDrawSurface7 *iface, IDir
     /* Update the wined3d frontbuffer if this is the frontbuffer. */
     if ((This->surface_desc.ddsCaps.dwCaps & DDSCAPS_FRONTBUFFER) && This->ddraw->wined3d_frontbuffer)
     {
-        hr = wined3d_surface_set_palette(This->ddraw->wined3d_frontbuffer, PalImpl ? PalImpl->wineD3DPalette : NULL);
+        hr = wined3d_surface_set_palette(This->ddraw->wined3d_frontbuffer, palette_impl ? palette_impl->wineD3DPalette : NULL);
         if (FAILED(hr))
             ERR("Failed to set frontbuffer palette, hr %#x.\n", hr);
     }