diff --git a/makefile b/makefile
index 165351be..2836fa2d 100644
--- a/makefile
+++ b/makefile
@@ -85,6 +85,7 @@ clean: cleandoc
 	@rm -f $(SONGS)
 	@rm -f *.sbd
 	@rm -f *.sbx *.sxd
+	@rm -f ./lilypond/*.ps
 
 cleanall: clean
 	@rm -f $(PDF) $(PSF)