diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index 0f518dcfde0528066ddbfd4e1a8f359d53c4dcef..250fb08361564f4c8bdbb7072189d1a48225390d 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -143,8 +143,8 @@ int __init integrity_init_keyring(const unsigned int id)
 	return __integrity_init_keyring(id, perm, restriction);
 }
 
-int __init integrity_add_key(const unsigned int id, const void *data,
-			     off_t size, key_perm_t perm)
+static int __init integrity_add_key(const unsigned int id, const void *data,
+				    off_t size, key_perm_t perm)
 {
 	key_ref_t key;
 	int rc = 0;