diff --git a/Part3/09_memory/kernel/kernel.c b/Part3/09_memory/kernel/kernel.c
index 26f498a..25b71a8 100644
--- a/Part3/09_memory/kernel/kernel.c
+++ b/Part3/09_memory/kernel/kernel.c
@@ -166,11 +166,11 @@ void print_holes(node* umem_head) {
                 hole = add_node( hole, 0x10000, umem_head->base_register-0x10000, true, 1);
             }
         } else if (umem_head->next == NULL) {
-            node previous = umem_head->previous;
+            node *previous = umem_head->previous;
             hole = add_node( hole, previous->base_register+previous->limit_register, -1, true, 1);
         } else {
-            node previous = umem_head->previous;
-            node next = umem_head->next;
+            node *previous = umem_head->previous;
+            node *next = umem_head->next;
             hole = add_node( hole, previous->base_register+previous->limit_register, next->base_register, true, 1);
         }
         umem_head = umem_head->next;