diff --git a/sys/src/cmd/ip/httpd/mkfile b/sys/src/cmd/ip/httpd/mkfile
index fe8b67d92..7afde2bfe 100644
--- a/sys/src/cmd/ip/httpd/mkfile
+++ b/sys/src/cmd/ip/httpd/mkfile
@@ -44,6 +44,8 @@ UPDATE=\
 	${LIBSOFILES:%.$O=%.c}\
 	${XTARG:%=%.c}\
 
+CLEANFILES=$LIB
+
 </sys/src/cmd/mkmany
 
 trial: $O.netlib_history