diff --git a/lib/logia.js b/lib/logia.js
index <HASH>..<HASH> 100644
--- a/lib/logia.js
+++ b/lib/logia.js
@@ -217,7 +217,12 @@ if(IN_SERVER_MODE){
     };
 
     UtilityBelt.toPrettyString = function(value){
-        var stringValue = typeof value === "object" ?  UtilityBelt.toReadableStringOfDepthOne(value) : value.toString();
+        var stringValue = value;
+        if(value){
+            stringValue = typeof value === "object"
+                                ?  UtilityBelt.toReadableStringOfDepthOne(value)
+                                : value.toString();
+        }
         return stringValue;
     };
lib/logia.js: Added guard against undefined argument value of toPrettyString function