diff --git a/includes/server/activities/like.php b/includes/server/activities/like.php
index 8d0cf47..04abb37 100644
--- a/includes/server/activities/like.php
+++ b/includes/server/activities/like.php
@@ -28,7 +28,7 @@ function handle_outbox( $actor, $activity ) {
         return $res;
     }
     if ( \objects\is_local_object( $object ) ) {
-        $activity_id = \activities\get_activity_id( $activity['id'] );
+        $activity_id = \objects\get_object_id( $activity['id'] );
         if ( !$activity_id ) {
             return new \WP_Error(
                 'not_found',
@@ -66,7 +66,7 @@ function handle_inbox( $actor, $activity ) {
         );
     }
     if ( \objects\is_local_object( $object ) ) {
-        $activity_id = \activities\get_activity_id( $activity['id'] );
+        $activity_id = \objects\get_object_id( $activity['id'] );
         if ( !$activity_id ) {
             return new \WP_Error(
                 'not_found',
diff --git a/includes/server/activities/undo.php b/includes/server/activities/undo.php
index 4c21ba2..776e149 100644
--- a/includes/server/activities/undo.php
+++ b/includes/server/activities/undo.php
@@ -40,7 +40,7 @@ function handle_outbox( $actor_slug, $activity ) {
             break;
         }
         \likes\delete_local_actor_like( $actor_id, $liked_object_id );
-        $like_id = \activities\get_activity_id( $object['id'] );
+        $like_id = \objects\get_object_id( $object['id'] );
         if ( !$like_id ) {
             break;
         }
@@ -108,7 +108,7 @@ function handle_inbox( $actor_slug, $activity ) {
                 break;
             }
             $object_id = \objects\get_object_id( $object_url );
-            $like_id = \activities\get_activity_id( $object['id'] );
+            $like_id = \objects\get_object_id( $object['id'] );
             if ( !$like_id ) {
                 break;
             }