diff --git a/include/linux/key.h b/include/linux/key.h
index 938d7ecfb495d..943a432da3ae6 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -515,6 +515,7 @@ extern void key_init(void);
 #define key_init()			do { } while(0)
 #define key_free_user_ns(ns)		do { } while(0)
 #define key_remove_domain(d)		do { } while(0)
+#define key_lookup(k)			NULL
 
 #endif /* CONFIG_KEYS */
 #endif /* __KERNEL__ */
diff --git a/security/keys/key.c b/security/keys/key.c
index 5c0c7df833f8a..0260a1902922e 100644
--- a/security/keys/key.c
+++ b/security/keys/key.c
@@ -693,6 +693,7 @@ struct key *key_lookup(key_serial_t id)
 	spin_unlock(&key_serial_lock);
 	return key;
 }
+EXPORT_SYMBOL(key_lookup);
 
 /*
  * Find and lock the specified key type against removal.