diff --git a/Makefile b/Makefile
index c4ddc29..13faaca 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ PART = xc7a35tcsg324-1
 all: pixelflut.bit
 
 clean:
-	rm -f pixelflut.bit pixelflut.fasm pixelflut.json
+	rm -f pixelflut.bit pixelflut.fasm pixelflut.frames pixelflut.json
 
 prog: pixelflut.bit
 	openFPGALoader -b arty_a7_35t $<