diff --git a/stack.h b/stack.h
index 243e8e8..b379424 100644
--- a/stack.h
+++ b/stack.h
@@ -11,7 +11,7 @@ The latest element is taken from the stack. */
 
 
 typedef struct Node{
-  int data;
+  int *data;
   struct Node *next;
 
   } StackNode;