diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index 1aeea95208c..bf379cabd01 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -4891,10 +4891,6 @@ HRESULT surface_load_location(IWineD3DSurfaceImpl *surface, DWORD flag, const RE
     return WINED3D_OK;
 }
 
-static WINED3DSURFTYPE WINAPI IWineD3DSurfaceImpl_GetImplType(IWineD3DSurface *iface) {
-    return SURFACE_OPENGL;
-}
-
 BOOL surface_is_offscreen(IWineD3DSurfaceImpl *surface)
 {
     struct wined3d_swapchain *swapchain = surface->container.u.swapchain;
@@ -4952,7 +4948,6 @@ const IWineD3DSurfaceVtbl IWineD3DSurface_Vtbl =
     /* Internal use: */
     IWineD3DSurfaceImpl_SetFormat,
     IWineD3DSurfaceImpl_PrivateSetup,
-    IWineD3DSurfaceImpl_GetImplType,
 };
 
 static HRESULT ffp_blit_alloc(IWineD3DDeviceImpl *device) { return WINED3D_OK; }
@@ -5539,11 +5534,6 @@ static HRESULT WINAPI IWineGDISurfaceImpl_SetMem(IWineD3DSurface *iface, void *m
     return WINED3D_OK;
 }
 
-static WINED3DSURFTYPE WINAPI IWineGDISurfaceImpl_GetImplType(IWineD3DSurface *iface)
-{
-    return SURFACE_GDI;
-}
-
 static const IWineD3DSurfaceVtbl IWineGDISurface_Vtbl =
 {
     /* IUnknown */
@@ -5586,7 +5576,6 @@ static const IWineD3DSurfaceVtbl IWineGDISurface_Vtbl =
     /* Internal use: */
     IWineD3DBaseSurfaceImpl_SetFormat,
     IWineGDISurfaceImpl_PrivateSetup,
-    IWineGDISurfaceImpl_GetImplType,
 };
 
 HRESULT surface_init(IWineD3DSurfaceImpl *surface, WINED3DSURFTYPE surface_type, UINT alignment,
@@ -5650,6 +5639,8 @@ HRESULT surface_init(IWineD3DSurfaceImpl *surface, WINED3DSURFTYPE surface_type,
     if (!resource_size)
         return WINED3DERR_INVALIDCALL;
 
+    surface->surface_type = surface_type;
+
     /* Look at the implementation and set the correct Vtable. */
     switch (surface_type)
     {
diff --git a/dlls/wined3d/surface_base.c b/dlls/wined3d/surface_base.c
index 07057190364..6bd073d3a49 100644
--- a/dlls/wined3d/surface_base.c
+++ b/dlls/wined3d/surface_base.c
@@ -899,8 +899,7 @@ static IWineD3DSurfaceImpl *surface_convert_format(IWineD3DSurfaceImpl *source,
     IWineD3DDevice_CreateSurface((IWineD3DDevice *)source->resource.device, source->resource.width,
             source->resource.height, to_fmt, TRUE /* lockable */, TRUE /* discard  */, 0 /* level */,
             0 /* usage */, WINED3DPOOL_SCRATCH, WINED3DMULTISAMPLE_NONE /* TODO: Multisampled conversion */,
-            0 /* MultiSampleQuality */, IWineD3DSurface_GetImplType((IWineD3DSurface *) source),
-            NULL /* parent */, &wined3d_null_parent_ops, &ret);
+            0 /* MultiSampleQuality */, source->surface_type, NULL /* parent */, &wined3d_null_parent_ops, &ret);
     if(!ret) {
         ERR("Failed to create a destination surface for conversion\n");
         return NULL;
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 416082c7bcf..8c904645258 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -2041,6 +2041,7 @@ struct IWineD3DSurfaceImpl
 
     DWORD flags;
 
+    WINED3DSURFTYPE surface_type;
     UINT                      pow2Width;
     UINT                      pow2Height;
 
diff --git a/include/wine/wined3d.idl b/include/wine/wined3d.idl
index 82f5f76a463..422551d4bda 100644
--- a/include/wine/wined3d.idl
+++ b/include/wine/wined3d.idl
@@ -2285,8 +2285,6 @@ interface IWineD3DSurface : IUnknown
     );
     HRESULT PrivateSetup(
     );
-    WINED3DSURFTYPE GetImplType(
-    );
 }
 
 [