diff --git a/src/ddsurface.c b/src/ddsurface.c
index d1a1b24..e6770a4 100644
--- a/src/ddsurface.c
+++ b/src/ddsurface.c
@@ -1227,7 +1227,7 @@ HRESULT dds_SetSurfaceDesc(IDirectDrawSurfaceImpl* This, LPDDSURFACEDESC2 lpDDSD
 
     DWORD req_flags = DDSD_LPSURFACE | DDSD_PITCH | DDSD_HEIGHT | DDSD_WIDTH | DDSD_PIXELFORMAT;
 
-    if ((lpDDSD->dwFlags & req_flags) != req_flags)
+    if (((lpDDSD->dwFlags & req_flags) != req_flags) && (lpDDSD->dwFlags & DDSD_ALL) == 0)
         return DDERR_UNSUPPORTED;