diff --git a/asyncblock.js b/asyncblock.js
index <HASH>..<HASH> 100644
--- a/asyncblock.js
+++ b/asyncblock.js
@@ -39,7 +39,9 @@ var getNextTaskId = (function(){
     var taskId = 1;
 
     return function(){
-        return taskId++;
+        ++taskId;
+
+        return '_ab_' + taskId;
     };
 })();
Reducing likelihood of collision with generated task ids