diff --git a/source/blender/src/interface_icons.c b/source/blender/src/interface_icons.c
index 53ad1840a37..778b858f5ac 100644
--- a/source/blender/src/interface_icons.c
+++ b/source/blender/src/interface_icons.c
@@ -671,7 +671,7 @@ static void icon_from_image(Image* img, RenderInfo* ri)
 	
 	if (!ri->rect) {
 		ri->rect= MEM_callocN(pr_size, "butsrect");
-		memset(ri->rect, 0xFF, pr_size);
+		memset(ri->rect, 0x00, pr_size);
 	}
 	
 	/* we only load image if there's no preview saved already ...