diff --git a/lib/client.js b/lib/client.js
index 6b51bcec..4a085b2d 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -464,13 +464,15 @@ var Util, DOM, CloudFunc, join;
         };
         
         function getStrBigFirst(str) {
-            var isStr   = Util.type.string(str),
-                ret     = str;
+            var first;
             
-            if (isStr && str.length)
-                ret =  str[0].toUpperCase() + str.substring(1);
+            if (!str)
+                throw Error('str could not be empty!');
             
-            return ret;
+            first   = str[0].toUpperCase();
+            str     = first + str.slice(1);
+            
+            return str;
         }
         
     }