diff --git a/dlls/d3d8/buffer.c b/dlls/d3d8/buffer.c
index 74d81f4bb3a..6ca88291508 100644
--- a/dlls/d3d8/buffer.c
+++ b/dlls/d3d8/buffer.c
@@ -297,6 +297,11 @@ HRESULT vertexbuffer_init(IDirect3DVertexBuffer8Impl *buffer, IDirect3DDevice8Im
     return D3D_OK;
 }
 
+static inline IDirect3DIndexBuffer8Impl *impl_from_IDirect3DIndexBuffer8(IDirect3DIndexBuffer8 *iface)
+{
+    return CONTAINING_RECORD(iface, IDirect3DIndexBuffer8Impl, lpVtbl);
+}
+
 static HRESULT WINAPI d3d8_indexbuffer_QueryInterface(IDirect3DIndexBuffer8 *iface, REFIID riid, void **object)
 {
     TRACE("iface %p, riid %s, object %p.\n", iface, debugstr_guid(riid), object);
@@ -371,14 +376,16 @@ static HRESULT WINAPI d3d8_indexbuffer_GetDevice(IDirect3DIndexBuffer8 *iface, I
 static HRESULT WINAPI d3d8_indexbuffer_SetPrivateData(IDirect3DIndexBuffer8 *iface,
         REFGUID guid, const void *data, DWORD data_size, DWORD flags)
 {
+    IDirect3DIndexBuffer8Impl *buffer = impl_from_IDirect3DIndexBuffer8(iface);
+    struct wined3d_resource *resource;
     HRESULT hr;
 
     TRACE("iface %p, guid %s, data %p, data_size %u, flags %#x.\n",
             iface, debugstr_guid(guid), data, data_size, flags);
 
     wined3d_mutex_lock();
-    hr = wined3d_buffer_set_private_data(((IDirect3DIndexBuffer8Impl *)iface)->wineD3DIndexBuffer,
-            guid, data, data_size, flags);
+    resource = wined3d_buffer_get_resource(buffer->wineD3DIndexBuffer);
+    hr = wined3d_resource_set_private_data(resource, guid, data, data_size, flags);
     wined3d_mutex_unlock();
 
     return hr;
@@ -387,14 +394,16 @@ static HRESULT WINAPI d3d8_indexbuffer_SetPrivateData(IDirect3DIndexBuffer8 *ifa
 static HRESULT WINAPI d3d8_indexbuffer_GetPrivateData(IDirect3DIndexBuffer8 *iface,
         REFGUID guid, void *data, DWORD *data_size)
 {
+    IDirect3DIndexBuffer8Impl *buffer = impl_from_IDirect3DIndexBuffer8(iface);
+    struct wined3d_resource *resource;
     HRESULT hr;
 
     TRACE("iface %p, guid %s, data %p, data_size %p.\n",
             iface, debugstr_guid(guid), data, data_size);
 
     wined3d_mutex_lock();
-    hr = wined3d_buffer_get_private_data(((IDirect3DIndexBuffer8Impl *)iface)->wineD3DIndexBuffer,
-            guid, data, data_size);
+    resource = wined3d_buffer_get_resource(buffer->wineD3DIndexBuffer);
+    hr = wined3d_resource_get_private_data(resource, guid, data, data_size);
     wined3d_mutex_unlock();
 
     return hr;
@@ -402,12 +411,15 @@ static HRESULT WINAPI d3d8_indexbuffer_GetPrivateData(IDirect3DIndexBuffer8 *ifa
 
 static HRESULT WINAPI d3d8_indexbuffer_FreePrivateData(IDirect3DIndexBuffer8 *iface, REFGUID guid)
 {
+    IDirect3DIndexBuffer8Impl *buffer = impl_from_IDirect3DIndexBuffer8(iface);
+    struct wined3d_resource *resource;
     HRESULT hr;
 
     TRACE("iface %p, guid %s.\n", iface, debugstr_guid(guid));
 
     wined3d_mutex_lock();
-    hr = wined3d_buffer_free_private_data(((IDirect3DIndexBuffer8Impl *)iface)->wineD3DIndexBuffer, guid);
+    resource = wined3d_buffer_get_resource(buffer->wineD3DIndexBuffer);
+    hr = wined3d_resource_free_private_data(resource, guid);
     wined3d_mutex_unlock();
 
     return hr;
diff --git a/dlls/wined3d/buffer.c b/dlls/wined3d/buffer.c
index 306849a2661..2f6ff2a9475 100644
--- a/dlls/wined3d/buffer.c
+++ b/dlls/wined3d/buffer.c
@@ -585,23 +585,6 @@ void * CDECL wined3d_buffer_get_parent(const struct wined3d_buffer *buffer)
     return buffer->resource.parent;
 }
 
-HRESULT CDECL wined3d_buffer_set_private_data(struct wined3d_buffer *buffer,
-        REFGUID guid, const void *data, DWORD data_size, DWORD flags)
-{
-    return wined3d_resource_set_private_data(&buffer->resource, guid, data, data_size, flags);
-}
-
-HRESULT CDECL wined3d_buffer_get_private_data(const struct wined3d_buffer *buffer,
-        REFGUID guid, void *data, DWORD *data_size)
-{
-    return wined3d_resource_get_private_data(&buffer->resource, guid, data, data_size);
-}
-
-HRESULT CDECL wined3d_buffer_free_private_data(struct wined3d_buffer *buffer, REFGUID guid)
-{
-    return wined3d_resource_free_private_data(&buffer->resource, guid);
-}
-
 DWORD CDECL wined3d_buffer_set_priority(struct wined3d_buffer *buffer, DWORD priority)
 {
     return resource_set_priority(&buffer->resource, priority);
diff --git a/dlls/wined3d/wined3d.spec b/dlls/wined3d/wined3d.spec
index 8956774d40a..ab8d943d218 100644
--- a/dlls/wined3d/wined3d.spec
+++ b/dlls/wined3d/wined3d.spec
@@ -23,16 +23,13 @@
 @ cdecl wined3d_buffer_create_ib(ptr long long long ptr ptr ptr)
 @ cdecl wined3d_buffer_create_vb(ptr long long long ptr ptr ptr)
 @ cdecl wined3d_buffer_decref(ptr)
-@ cdecl wined3d_buffer_free_private_data(ptr ptr)
 @ cdecl wined3d_buffer_get_parent(ptr)
 @ cdecl wined3d_buffer_get_priority(ptr)
-@ cdecl wined3d_buffer_get_private_data(ptr ptr ptr ptr)
 @ cdecl wined3d_buffer_get_resource(ptr)
 @ cdecl wined3d_buffer_incref(ptr)
 @ cdecl wined3d_buffer_map(ptr long long ptr long)
 @ cdecl wined3d_buffer_preload(ptr)
 @ cdecl wined3d_buffer_set_priority(ptr long)
-@ cdecl wined3d_buffer_set_private_data(ptr ptr ptr long long)
 @ cdecl wined3d_buffer_unmap(ptr)
 
 @ cdecl wined3d_clipper_create()
diff --git a/include/wine/wined3d.h b/include/wine/wined3d.h
index 87d219ba93a..fccdaf3561c 100644
--- a/include/wine/wined3d.h
+++ b/include/wine/wined3d.h
@@ -2150,18 +2150,13 @@ HRESULT __cdecl wined3d_buffer_create_ib(struct wined3d_device *device, UINT len
 HRESULT __cdecl wined3d_buffer_create_vb(struct wined3d_device *device, UINT length, DWORD usage, WINED3DPOOL pool,
         void *parent, const struct wined3d_parent_ops *parent_ops, struct wined3d_buffer **buffer);
 ULONG __cdecl wined3d_buffer_decref(struct wined3d_buffer *buffer);
-HRESULT __cdecl wined3d_buffer_free_private_data(struct wined3d_buffer *buffer, REFGUID guid);
 void * __cdecl wined3d_buffer_get_parent(const struct wined3d_buffer *buffer);
 DWORD __cdecl wined3d_buffer_get_priority(const struct wined3d_buffer *buffer);
-HRESULT __cdecl wined3d_buffer_get_private_data(const struct wined3d_buffer *buffer,
-        REFGUID guid, void *data, DWORD *data_size);
 struct wined3d_resource * __cdecl wined3d_buffer_get_resource(struct wined3d_buffer *buffer);
 ULONG __cdecl wined3d_buffer_incref(struct wined3d_buffer *buffer);
 HRESULT __cdecl wined3d_buffer_map(struct wined3d_buffer *buffer, UINT offset, UINT size, BYTE **data, DWORD flags);
 void  __cdecl wined3d_buffer_preload(struct wined3d_buffer *buffer);
 DWORD __cdecl wined3d_buffer_set_priority(struct wined3d_buffer *buffer, DWORD new_priority);
-HRESULT __cdecl wined3d_buffer_set_private_data(struct wined3d_buffer *buffer,
-        REFGUID guid, const void *data, DWORD data_size, DWORD flags);
 void __cdecl wined3d_buffer_unmap(struct wined3d_buffer *buffer);
 
 struct wined3d_clipper * __cdecl wined3d_clipper_create(void);