diff --git a/coffee/lib/abstract-chosen.coffee b/coffee/lib/abstract-chosen.coffee
index 02d225b672c..15f7ba6e84f 100644
--- a/coffee/lib/abstract-chosen.coffee
+++ b/coffee/lib/abstract-chosen.coffee
@@ -245,7 +245,7 @@ class AbstractChosen
       when 27
         this.results_hide() if @results_showing
         return true
-      when 9, 38, 40, 16, 91, 17
+      when 9, 38, 40, 16, 91, 17, 18
         # don't do anything on these keys
       else this.results_search()