diff --git a/cleanup.sh b/cleanup.sh
index 5c0046d..c7f5054 100755
--- a/cleanup.sh
+++ b/cleanup.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-subdirs="compiler/cpp lib/cpp lib/py"
+subdirs="compiler/cpp lib/cpp lib/py if"
 
 rm -rf \
 AUTHORS \