diff --git a/docs/HandlingExceptions.md b/docs/HandlingExceptions.md
index e11d24f..6129b0f 100644
--- a/docs/HandlingExceptions.md
+++ b/docs/HandlingExceptions.md
@@ -81,7 +81,7 @@ try
     }
 
     //check purchases
-    var purchase = await billing.PurchaseAsync(productId, ItemType.InAppPurchase, "devId");
+    var purchase = await billing.PurchaseAsync(productId, ItemType.InAppPurchase);
 
     //possibility that a null came through.
     if(purchase == null)
@@ -130,4 +130,4 @@ finally
 
 ```
 
-<= Back to [Table of Contents](README.md)
\ No newline at end of file
+<= Back to [Table of Contents](README.md)