diff --git a/lib/util.js b/lib/util.js
index 5e43be92..f28ab4b3 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -96,7 +96,7 @@ Util = exports || {};
         var lArg        = pArg,
             lConsole    = Scope.console,
             lDate       = '[' + Util.getDate() + '] ';
-        
+                
         if(lConsole && pArg)
             lConsole.log(lDate, lArg);
         
@@ -136,7 +136,11 @@ Util = exports || {};
     };
     
     Util.replaceStr             = function(pStr, pFrom, pTo){
-       var lRet = pStr.replace(new RegExp(pFrom, 'g'), pTo);
+        var lRet;
+        
+        if(pStr && pFrom && pTo)
+            lRet = pStr.replace(new RegExp(pFrom, 'g'), pTo);
+       
        return lRet;
     };