diff --git a/Part3/09_memory/kernel/kernel.c b/Part3/09_memory/kernel/kernel.c
index fb39d4c..c09f17d 100644
--- a/Part3/09_memory/kernel/kernel.c
+++ b/Part3/09_memory/kernel/kernel.c
@@ -167,7 +167,8 @@ void print_holes(node* umem_head) {
     while(umem_head != NULL) {
         if (umem_head->next != NULL) {
             node *next = umem_head->next;
-            hole = add_node( hole, umem_head->base_register+umem_head->limit_register, next->base_register, true, ++hole_ids);
+            u32 total = umem_head->base_register+umem_head->limit_register;
+            hole = add_node( hole, total, next->base_register-total, true, ++hole_ids);
         } else {
             node *previous = umem_head->previous;
             hole = add_node( hole, previous->base_register+previous->limit_register, -1, true, ++hole_ids);