diff --git a/src/mongo/MongoGraph.class.php b/src/mongo/MongoGraph.class.php
index 7b2ead41..1a5c319e 100644
--- a/src/mongo/MongoGraph.class.php
+++ b/src/mongo/MongoGraph.class.php
@@ -144,7 +144,7 @@ private function add_tarray_to_index($tarray)
      * Convert from Tripod value object format (comapct) to ExtendedGraph format (verbose)
      *
      * @param array $mongoValueObject
-     * @return array| false an array of values or false if the value is not valid
+     * @return array|bool an array of values or false if the value is not valid
      */
     private function toGraphValueObject($mongoValueObject)
     {