diff --git a/specification/ch_1.xml b/specification/ch_1.xml
index 1528057..921ab34 100644
--- a/specification/ch_1.xml
+++ b/specification/ch_1.xml
@@ -213,6 +213,8 @@
a TOC pointer for such accesses. The ABI has been updated to
describe the implications of this new capability. For specifics,
see , , , , , ,
+
+ Code Alignment
+
+ Functions must be aligned on at least a 4-byte boundary.
+
+
+ If a function contains any prefixed (8-byte) instructions,
+ functions must be aligned on at least a 64-byte boundary.
+ This is necessary so that compilers and assemblers can avoid
+ placing a prefixed instruction so that it crosses a 64-byte
+ boundary.
+
+