diff --git a/06.Lesson_ThinkingProperties/AuctionDemonstration/AuctionBroken.sol b/06.Lesson_ThinkingProperties/AuctionDemonstration/AuctionBroken.sol
index cce3d0a8..e356dcc8 100644
--- a/06.Lesson_ThinkingProperties/AuctionDemonstration/AuctionBroken.sol
+++ b/06.Lesson_ThinkingProperties/AuctionDemonstration/AuctionBroken.sol
@@ -101,7 +101,7 @@ contract AuctionImpl is TokenInterface {
 		require(auctions[id].bid_expiry != 0
 				&& (auctions[id].bid_expiry < now || 
 					auctions[id].end_time < now));
-		mint(auctions[id].winner, auctions[id].prize);n
+		mint(auctions[id].winner, auctions[id].prize);
 		delete auctions[id];
 	}