diff --git a/lib/alertify.js b/lib/alertify.js
index 3a30fed5..c7709daa 100755
--- a/lib/alertify.js
+++ b/lib/alertify.js
@@ -172,8 +172,8 @@
 					if ((keyCode === keys.SPACE && !hasInput) || (hasInput && keyCode === keys.ENTER)) ok(event);
 					if (keyCode === keys.ESC && hasCancel) cancel(event);
           if (keyCode === keys.ESC) {
-            var cancel = document.querySelector('.alertify-dialog button.cancel');
-            if (cancel) cancel.click();
+            var cancelBtn = document.querySelector('.alertify-dialog button.cancel');
+            if (cancelBtn) cancelBtn.click();
           }
 				};