diff --git a/src/main/frontend/modules/outliner/pipeline.cljs b/src/main/frontend/modules/outliner/pipeline.cljs
index 81eadaf9ca..73743fabde 100644
--- a/src/main/frontend/modules/outliner/pipeline.cljs
+++ b/src/main/frontend/modules/outliner/pipeline.cljs
@@ -111,7 +111,7 @@
 
              :else
              v)]
-    (when v'
+    (when (some? v')
       [a v'])))
 
 (defn invoke-hooks