diff --git a/sys/man/mkfile b/sys/man/mkfile
index da11852d2..2a60a393c 100644
--- a/sys/man/mkfile
+++ b/sys/man/mkfile
@@ -116,4 +116,6 @@ print.out:V: permind
 	ps2pdf $prereq $target
 
 clean:V:
-	rm -f man.out print.out
+	rm -f man.out print.out searchindex $LIB/lookman/index [0-8]^/INDEX^('' .html)
+	builtin cd $LIB/permind
+	mk clean