diff --git a/kernel/malloc.asm b/kernel/malloc.asm
index 9496110..fe34e04 100644
--- a/kernel/malloc.asm
+++ b/kernel/malloc.asm
@@ -42,11 +42,13 @@ malloc_get_table:
   mov di, 0x0600
   ret
 
+; IN: 0:BX ptr to paragraph to be marked as allocated
 malloc_mark_allocated:
   call malloc_calc_offsets
   or byte [bx+di], al
   ret
 
+; IN: 0:BX ptr to paragraph to be marked as free
 malloc_mark_free:
   call malloc_calc_offsets
   not al