diff --git a/lib/deck.c b/lib/deck.c
index a1677ca..63ad622 100644
--- a/lib/deck.c
+++ b/lib/deck.c
@@ -7,6 +7,7 @@ void allocate_deck(struct deck **deck) {
   *deck = malloc(sizeof(**deck));
 
   allocate_stack(&((*deck)->stock));
+  allocate_stack(&((*deck)->waste_pile));
 
   allocate_stack(&((*deck)->foundation_0));
   allocate_stack(&((*deck)->foundation_1));
@@ -26,6 +27,7 @@ void allocate_deck(struct deck **deck) {
 
 void initialize_deck(struct deck *deck) {
   initialize_stack(deck->stock);
+  initialize_stack(deck->waste_pile);
 
   initialize_stack(deck->foundation_0);
   initialize_stack(deck->foundation_1);
@@ -45,6 +47,7 @@ void initialize_deck(struct deck *deck) {
 
 void delete_deck(struct deck *deck) {
   delete_stack(deck->stock);
+  delete_stack(deck->waste_pile);
 
   delete_stack(deck->foundation_0);
   delete_stack(deck->foundation_1);
diff --git a/lib/deck.h b/lib/deck.h
index 624a7a5..25531e1 100644
--- a/lib/deck.h
+++ b/lib/deck.h
@@ -7,6 +7,7 @@
 
 struct deck {
   struct stack *stock;
+  struct stack *waste_pile;
 
   struct stack *foundation_0;
   struct stack *foundation_1;