diff --git a/public/javascripts/validation.js b/public/javascripts/validation.js
index d456bce49..24c8fdf2e 100644
--- a/public/javascripts/validation.js
+++ b/public/javascripts/validation.js
@@ -11,8 +11,8 @@ var Validation = {
   },
   events: { 
     usernameKeypress: function(evt) {
-      if(evt.charCode === 0) { return; }
-      if(!Validation.rules.username.characters.test(this.value + String.fromCharCode(evt.charCode))) {
+      if(evt.keyCode === 0) { return; }
+      if(!Validation.rules.username.characters.test(this.value + String.fromCharCode(evt.keyCode))) {
         evt.preventDefault();
       }
     }