diff --git a/src/i_video.c b/src/i_video.c
index 8bd95b78e..87880be2d 100644
--- a/src/i_video.c
+++ b/src/i_video.c
@@ -1631,6 +1631,10 @@ static void SetVideoMode(void)
     if (argbbuffer == NULL)
     {
 #ifdef CRISPY_TRUECOLOR
+        int bpp;
+
+        SDL_PixelFormatEnumToMasks(SDL_PIXELFORMAT_ARGB8888, &bpp,
+                                   &rmask, &gmask, &bmask, &amask);
         argbbuffer = SDL_CreateRGBSurfaceWithFormat(
                      0, SCREENWIDTH, SCREENHEIGHT, 32, SDL_PIXELFORMAT_ARGB8888);