diff --git a/channels/chan_iax2.c b/channels/chan_iax2.c
index d8fdc0e73cc4223bbeb7c6e6729b7bc3c1b68d05..3928ed842e14ed644dbb1a53ba0e363335802bd5 100644
--- a/channels/chan_iax2.c
+++ b/channels/chan_iax2.c
@@ -12950,7 +12950,7 @@ static void delete_users(void)
 {
 	struct iax2_registry *reg;
 
-	ao2_callback(users, 0, user_delme_cb, NULL);
+	ao2_callback(users, OBJ_NODATA, user_delme_cb, NULL);
 
 	AST_LIST_LOCK(&registrations);
 	while ((reg = AST_LIST_REMOVE_HEAD(&registrations, entry))) {
@@ -12972,7 +12972,7 @@ static void delete_users(void)
 	}
 	AST_LIST_UNLOCK(&registrations);
 
-	ao2_callback(peers, 0, peer_delme_cb, NULL);
+	ao2_callback(peers, OBJ_NODATA, peer_delme_cb, NULL);
 }
 
 static void prune_users(void)