diff --git a/services/web/public/coffee/ide/pdfng/directives/pdfHighlights.coffee b/services/web/public/coffee/ide/pdfng/directives/pdfHighlights.coffee
index fc2b72bd79..45ec988c38 100644
--- a/services/web/public/coffee/ide/pdfng/directives/pdfHighlights.coffee
+++ b/services/web/public/coffee/ide/pdfng/directives/pdfHighlights.coffee
@@ -24,6 +24,6 @@ define [
 
 			clearHighlights: () ->
 				for h in @highlightElements
-					h.remove()
+					h?.remove()
 				@highlightElements = []
 	]