diff --git a/lib/cloudfunc.js b/lib/cloudfunc.js
index 37156ae1..7707b3d3 100644
--- a/lib/cloudfunc.js
+++ b/lib/cloudfunc.js
@@ -87,7 +87,7 @@ var Util;
          */
         this.rmLastSlash               = function(pPath) {
             var lRet        = pPath,
-                lIsStr      = typeof pPath==='string',
+                lIsStr      = Util.isString(pPath),
                 lLengh      = pPath.length-1,
                 lLastSlash  = pPath.lastIndexOf('/');