diff --git a/subjects/card_deck/README.md b/subjects/card_deck/README.md
index b27d7d8032..ffb9608a49 100644
--- a/subjects/card_deck/README.md
+++ b/subjects/card_deck/README.md
@@ -66,9 +66,9 @@ fn main() {
         suit: Suit::random(),
     };
 
-    println!("Your card is {:?}", your_card);
+    println!("Your card is {:?}", &your_card);
 
-    if card_deck::winner_card(your_card) {
+    if card_deck::winner_card(&your_card) {
         println!("You are the winner!");
     }
 }