diff --git a/Services/OpenStreetMap/Object.php b/Services/OpenStreetMap/Object.php
index 9c1aa9c..ff65586 100644
--- a/Services/OpenStreetMap/Object.php
+++ b/Services/OpenStreetMap/Object.php
@@ -202,7 +202,7 @@ public function getOsmChangeXml()
                 $set[$key] = $val;
             }
 
-            $diff = array_diff($this->getTags(), $set);
+            $diff = array_diff_assoc($this->getTags(), $set);
 
             // Remove existing tags
             for ($i = 0; $i < $tags->length; $i++) {