diff --git a/lib/util.js b/lib/util.js
index 5e6dc534..01e3146e 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -870,12 +870,15 @@
          * @return Ext
          */
         this.getExtension               = function(name) {
-            var ret, dot,
-                isStr = Util.isString(name);
+            var ret     = '',
+                dot,
+                isStr   = Util.isString(name);
             
             if (isStr) {
                 dot = name.lastIndexOf('.');
-                ret = name.substr(dot);
+                
+                if (~dot)
+                    ret = name.substr(dot);
             }
             
             return ret;