diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index a0f4f3a5146..1399a1de1f3 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -6285,7 +6285,7 @@ function object_property_exists( $obj, $property ) {
     else {
         $properties = get_object_vars( $obj );
     }
-    return array_key_exists( $properties, $property );
+    return array_key_exists( $property, $properties );
 }