diff --git a/module/story/model.php b/module/story/model.php
index 12c76ec69c..949e2202b1 100644
--- a/module/story/model.php
+++ b/module/story/model.php
@@ -5615,7 +5615,7 @@ class storyModel extends model
             ->leftJoin(TABLE_STORY)->alias('t3')->on("t2.AType='story' AND t2.AID=t3.id")
             ->where('t1.revision')->in($revisions)
             ->andWhere('t1.repo')->eq($repoID)
-            ->andWhere('t3.id')->ne('')
+            ->andWhere('t3.id')->notNULL()
             ->fetchGroup('revision', 'id');
     }
 }