diff --git a/lib/handlebars/compiler.js b/lib/handlebars/compiler.js
index 843e0b90..641f31a8 100644
--- a/lib/handlebars/compiler.js
+++ b/lib/handlebars/compiler.js
@@ -576,7 +576,7 @@ Handlebars.JavaScriptCompiler = function() {};
       var paramString = ["context"].concat(params).join(", ");
       var helperMissingString = ["context"].concat(helperId).concat(params).join(", ");
 
-      nextStack = this.nextStack();
+      var nextStack = this.nextStack();
 
       this.source.push("if(typeof " + id + " === 'function') { " + nextStack + " = " + id + ".call(" + paramString + "); }");
       fn.call(this, nextStack, helperMissingString, id);