diff --git a/dlls/ddraw/palette.c b/dlls/ddraw/palette.c
index 980c62b60b4..68fb3a53207 100644
--- a/dlls/ddraw/palette.c
+++ b/dlls/ddraw/palette.c
@@ -215,7 +215,8 @@ static HRESULT WINAPI ddraw_palette_GetEntries(IDirectDrawPalette *iface,
     return hr;
 }
 
-static const struct IDirectDrawPaletteVtbl ddraw_palette_vtbl =
+/* Some windowed mode wrappers expect this vtbl to be writable. */
+static struct IDirectDrawPaletteVtbl ddraw_palette_vtbl =
 {
     /*** IUnknown ***/
     ddraw_palette_QueryInterface,
diff --git a/dlls/ddraw/surface.c b/dlls/ddraw/surface.c
index 44230838352..ba56fad9644 100644
--- a/dlls/ddraw/surface.c
+++ b/dlls/ddraw/surface.c
@@ -5406,7 +5406,8 @@ static HRESULT WINAPI d3d_texture1_Load(IDirect3DTexture *iface, IDirect3DTextur
  * The VTable
  *****************************************************************************/
 
-static const struct IDirectDrawSurface7Vtbl ddraw_surface7_vtbl =
+/* Some windowed mode wrappers expect this vtbl to be writable. */
+static struct IDirectDrawSurface7Vtbl ddraw_surface7_vtbl =
 {
     /* IUnknown */
     ddraw_surface7_QueryInterface,
@@ -5465,7 +5466,8 @@ static const struct IDirectDrawSurface7Vtbl ddraw_surface7_vtbl =
     ddraw_surface7_GetLOD,
 };
 
-static const struct IDirectDrawSurface4Vtbl ddraw_surface4_vtbl =
+/* Some windowed mode wrappers expect this vtbl to be writable. */
+static struct IDirectDrawSurface4Vtbl ddraw_surface4_vtbl =
 {
     /* IUnknown */
     ddraw_surface4_QueryInterface,
@@ -5519,7 +5521,8 @@ static const struct IDirectDrawSurface4Vtbl ddraw_surface4_vtbl =
     ddraw_surface4_ChangeUniquenessValue,
 };
 
-static const struct IDirectDrawSurface3Vtbl ddraw_surface3_vtbl =
+/* Some windowed mode wrappers expect this vtbl to be writable. */
+static struct IDirectDrawSurface3Vtbl ddraw_surface3_vtbl =
 {
     /* IUnknown */
     ddraw_surface3_QueryInterface,
@@ -5567,7 +5570,8 @@ static const struct IDirectDrawSurface3Vtbl ddraw_surface3_vtbl =
     ddraw_surface3_SetSurfaceDesc,
 };
 
-static const struct IDirectDrawSurface2Vtbl ddraw_surface2_vtbl =
+/* Some windowed mode wrappers expect this vtbl to be writable. */
+static struct IDirectDrawSurface2Vtbl ddraw_surface2_vtbl =
 {
     /* IUnknown */
     ddraw_surface2_QueryInterface,