diff --git a/sys/src/cmd/cc/mkfile b/sys/src/cmd/cc/mkfile
index 91310d62a..bebfebe47 100644
--- a/sys/src/cmd/cc/mkfile
+++ b/sys/src/cmd/cc/mkfile
@@ -24,6 +24,8 @@ HFILES=cc.h\
 
 YFILES=cc.y\
 
+CLEANFILES=$LIB
+
 CURCC=6c 8c qc vc
 OTHERCC=1c 2c 5c 7c kc