diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index fb4efe4..f8c850a 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -239,7 +239,7 @@
 	rc = next_entry(key, fp, len);
 	if (rc < 0)
 		goto err;
-	key[len] = 0;
+	key[len] = '\0';
 	if (hashtab_insert(h, key, booldatum))
 		goto err;