diff --git a/app/assets/javascripts/app/controllers/_manage/knowledge_base.coffee b/app/assets/javascripts/app/controllers/_manage/knowledge_base.coffee
index 337cc40f4..6cdfcb82b 100644
--- a/app/assets/javascripts/app/controllers/_manage/knowledge_base.coffee
+++ b/app/assets/javascripts/app/controllers/_manage/knowledge_base.coffee
@@ -51,7 +51,7 @@ class App.ManageKnowledgeBase extends App.ControllerTabs
 
   release: ->
     super
-    @modal.el.remove()
+    @modal?.el.remove()
 
   processLoaded: ->
     if @knowledge_base_id