diff --git a/src/js-to-webclgl.js b/src/js-to-webclgl.js
index e2dd4706..77bbebfa 100644
--- a/src/js-to-webclgl.js
+++ b/src/js-to-webclgl.js
@@ -149,6 +149,7 @@ var GPU_jsStrToWebclglStr = (function() {
 		retArr.push(") { ");
 		
 		// Argument state obj main prefix injection
+		var argStateObj = stateParam.argStateObj;
 		if( argStateObj && argStateObj.mainBodyPrefix && ast.id == "main" ) {
 			retArr.push(" ");
 			retArr.push(bodyPrefixVodooReplacementString);