diff --git a/includes/client/posts.php b/includes/client/posts.php
index b9144f3..cc20df1 100644
--- a/includes/client/posts.php
+++ b/includes/client/posts.php
@@ -74,7 +74,7 @@ function post_to_object( $post ) {
     );
     $existing = \pterotype\objects\get_object_by_url( $permalink );
     if ( $existing ) {
-        $object['id'] = $existing->activitypub_id;
+        $object['id'] = $existing['id'];
     }
     return $object;
 }
diff --git a/includes/server/objects.php b/includes/server/objects.php
index 57edaa7..1d51d42 100644
--- a/includes/server/objects.php
+++ b/includes/server/objects.php
@@ -18,7 +18,8 @@ function create_local_object( $object ) {
     }
     $object = compact_object( $object );
     $res = $wpdb->insert( $wpdb->prefix . 'pterotype_objects', array(
-        'object' => wp_json_encode( $object )
+        'object' => wp_json_encode( $object ),
+        'activitypub_id' => "uninitialized_" . rand(),
     ) );
     if ( !$res ) {
         return new \WP_Error(