diff --git a/src/types/CartContextType.ts b/src/types/CartContextType.ts
index 79e0552..1e7cc5a 100644
--- a/src/types/CartContextType.ts
+++ b/src/types/CartContextType.ts
@@ -2,7 +2,7 @@ import { CartItem } from './CartItem';
 
 export interface CartContextType {
   cart: CartItem[];
-  addToCart: (item: CartItem | undefined) => void;
+  addToCart: (item: CartItem) => void;
   changeItemCount: (id: string | number, quantity: number) => void;
   removeFromCart: (id: string | number) => void;
   clearCart: () => void;