diff --git a/app/views/invitations/edit.html.haml b/app/views/invitations/edit.html.haml
index 306d4fd18..a894947be 100644
--- a/app/views/invitations/edit.html.haml
+++ b/app/views/invitations/edit.html.haml
@@ -8,7 +8,7 @@
     };
 
     $("#user_username").keypress(function(evt) {
-      if(!Validation.username.characters.test(this.value + String.fromCharCode($
+      if(!Validation.username.characters.test(this.value + String.fromCharCode(evt.charCode)) { 
         evt.preventDefault();
       }
     });
diff --git a/app/views/registrations/new.html.haml b/app/views/registrations/new.html.haml
index cfe6e2dc2..918acd57b 100644
--- a/app/views/registrations/new.html.haml
+++ b/app/views/registrations/new.html.haml
@@ -8,7 +8,7 @@
     };
 
     $("#user_username").keypress(function(evt) {
-      if(!Validation.username.characters.test(this.value + String.fromCharCode($
+      if(!Validation.username.characters.test(this.value + String.fromCharCode(evt.charCode)) {
         evt.preventDefault();
       }
     });