diff --git a/kalloc.c b/kalloc.c
index 8c9ff93..7653242 100644
--- a/kalloc.c
+++ b/kalloc.c
@@ -30,6 +30,7 @@ kinit(void)
     kfree(p1);
 }
 
+//PAGEBREAK: 21
 // Free the page of physical memory pointed at by v,
 // which normally should have been returned by a
 // call to kalloc().  (The exception is when