diff --git a/images/Makefile b/images/Makefile
index f558744..f03284d 100644
--- a/images/Makefile
+++ b/images/Makefile
@@ -1,6 +1,6 @@
 
 resize:
-	rm -f sprites && mkdir sprites
+	rm -fr sprites && mkdir sprites
 	for i in fullsize/*; do \
 		convert -resize 15% $$i $${i/fullsize/sprites}; \
 	done