diff --git a/kernel/sys.c b/kernel/sys.c
index 5a9d6b0..da24bc1 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1259,7 +1259,7 @@
 }
 
 /* a simple bsearch */
-static int groups_search(struct group_info *group_info, gid_t grp)
+int groups_search(struct group_info *group_info, gid_t grp)
 {
 	int left, right;