diff --git a/index.js b/index.js
index 9f85c03..5a2ee5f 100644
--- a/index.js
+++ b/index.js
@@ -104,7 +104,7 @@ module.exports.getService = function (receipt) {
         }
         if (parsed.signature) {
             return module.exports.GOOGLE;
-        } else if (receipt.purchaseToken) {
+        } else if (parsed.purchaseToken) {
             return module.exports.GOOGLE;
         } else {
             return module.exports.AMAZON;