diff --git a/Alloy/commands/compile/parsers/Alloy.Abstract.Option.js b/Alloy/commands/compile/parsers/Alloy.Abstract.Option.js
index 086138093..fbdafc29a 100644
--- a/Alloy/commands/compile/parsers/Alloy.Abstract.Option.js
+++ b/Alloy/commands/compile/parsers/Alloy.Abstract.Option.js
@@ -25,7 +25,7 @@ function parse(node, state, args) {
 
 	if (attrName) {
 		if (args.createArgs[attrName]) {
-			code = `${attrVarName} = ${codePush} - 1`;
+			code = `var ${attrVarName} = ${codePush} - 1`;
 		} else {
 			code = `${attrVarName} = undefined; ${codePush}`;
 		}