diff --git a/content/notes/10-intro-to-c-arrays-malloc-free.md b/content/notes/10-intro-to-c-arrays-malloc-free.md
index b5390e723..428b78394 100644
--- a/content/notes/10-intro-to-c-arrays-malloc-free.md
+++ b/content/notes/10-intro-to-c-arrays-malloc-free.md
@@ -93,5 +93,6 @@ free(block);
 	- memory fragmentation
 - free same block more than once
 	- corrupt memory management routines
+	- lots of space between blocks that is too small to be used
 - using memory after it has been freed
 	- it have been re-used by malloc
\ No newline at end of file