diff --git a/dlls/ddraw/surface.c b/dlls/ddraw/surface.c
index aa478df3647..2785f35a52e 100644
--- a/dlls/ddraw/surface.c
+++ b/dlls/ddraw/surface.c
@@ -978,7 +978,7 @@ static HRESULT WINAPI ddraw_surface3_Blt(IDirectDrawSurface3 *iface, RECT *dst_r
  *  DDERR_CANNOTATTACHSURFACE if the surface can't be attached for some reason
  *
  *****************************************************************************/
-static HRESULT WINAPI ddraw_surface_attach_surface(IDirectDrawSurfaceImpl *This, IDirectDrawSurfaceImpl *Surf)
+static HRESULT ddraw_surface_attach_surface(IDirectDrawSurfaceImpl *This, IDirectDrawSurfaceImpl *Surf)
 {
     TRACE("surface %p, attachment %p.\n", This, Surf);