diff --git a/notebook/static/base/js/keyboard.js b/notebook/static/base/js/keyboard.js
index 721ee69f9..1ac50ad31 100644
--- a/notebook/static/base/js/keyboard.js
+++ b/notebook/static/base/js/keyboard.js
@@ -396,7 +396,7 @@ define([
             this.events.trigger('rebuild.QuickHelp');
           }
         } catch (ex) {
-          throw new Error('trying to remove a non-exist shortcut', shortcut);
+          throw new Error('trying to remove a non-existent shortcut', shortcut);
         }
     };