diff --git a/render/image.c b/render/image.c
index 10aa9b13..393afe84 100644
--- a/render/image.c
+++ b/render/image.c
@@ -139,6 +139,9 @@ void RrImageDraw(RrPixel32 *target, RrTextureRGBA *rgba,
         dw = (gint)(dh * ((gdouble)sw / sh));
     }
 
+    if (!(dw && dh))
+        return; /* XXX sanity check */
+
     if (sw != dw || sh != dh) {
         /*if (!(rgba->cache && dw == rgba->cwidth && dh == rgba->cheight))*/ {
             g_free(rgba->cache);