From 1193965b926d6752eb85a78dbe373be6caa1728e Mon Sep 17 00:00:00 2001
From: Paul Schaaf <paulsimonschaaf@gmail.com>
Date: Wed, 23 Mar 2022 18:12:34 -0400
Subject: [PATCH] add comment about zero-copy in space chapter

---
 src/chapter_5/space.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/chapter_5/space.md b/src/chapter_5/space.md
index 7fcbed8..e8aff7d 100644
--- a/src/chapter_5/space.md
+++ b/src/chapter_5/space.md
@@ -1,6 +1,8 @@
 # Space Reference
 
 This reference tells you how much space you should allocate for an account.
+This only applies to accounts that don't use `zero-copy`. `zero-copy` uses `repr(C)` with a pointer cast,
+so there the `C` layout applies.
 
 In addition to the space for the account data, you have to add `8` to the `space` constraint for Anchor's internal discriminator (see the example).