diff --git a/sc2/src/sc2code/libs/graphics/sdl/canvas.c b/sc2/src/sc2code/libs/graphics/sdl/canvas.c
index a81f8726e..93ad103d3 100644
--- a/sc2/src/sc2code/libs/graphics/sdl/canvas.c
+++ b/sc2/src/sc2code/libs/graphics/sdl/canvas.c
@@ -273,9 +273,9 @@ TFB_DrawCanvas_GetScaledExtent (TFB_Canvas src_canvas, int scale, PEXTENT size)
 	SDL_Surface *src = (SDL_Surface *)src_canvas;
 	size->width = (int) (src->w * scale / (float)GSCALE_IDENTITY);
 	size->height = (int) (src->h * scale / (float)GSCALE_IDENTITY);
-	if (!size->width)
+	if (!size->width && src->w)
 		size->width = 1;
-	if (!size->height)
+	if (!size->height && src->h)
 		size->height = 1;
 }