diff --git a/src/RageSurfaceUtils.cpp b/src/RageSurfaceUtils.cpp
index c677acdcb1..f5551dce8e 100644
--- a/src/RageSurfaceUtils.cpp
+++ b/src/RageSurfaceUtils.cpp
@@ -930,7 +930,7 @@ RageSurface *RageSurfaceUtils::MakeDummySurface( int height, int width )
 	RageSurfaceColor pink( 0xFF, 0x10, 0xFF, 0xFF );
 	ret_image->fmt.palette->colors[0] = pink;
 
-	memset( ret_image->pixels, 0, ret_image->h*ret_image->pitch );
+	memset( ret_image->pixels, 0, (size_t)ret_image->h * ret_image->pitch );
 
 	return ret_image;
 }