diff --git a/doc/arm/Bv9ARM.ch09.html b/doc/arm/Bv9ARM.ch09.html
index 791044d296..3b28e41f49 100644
--- a/doc/arm/Bv9ARM.ch09.html
+++ b/doc/arm/Bv9ARM.ch09.html
@@ -229,6 +229,10 @@
 	  for the number of UDP listeners has been changed to the number
 	  of detected processors minus one.
 	</p></li>
+<li class="listitem"><p>
+	  Zone transfers now use smaller message sizes to improve
+	  message compression. This results in reduced network usage.
+	</p></li>
 </ul></div>
 </div>
 <div class="section">
diff --git a/doc/arm/notes.html b/doc/arm/notes.html
index 6a036eda44..5bf2bc67ca 100644
--- a/doc/arm/notes.html
+++ b/doc/arm/notes.html
@@ -190,6 +190,10 @@
 	  for the number of UDP listeners has been changed to the number
 	  of detected processors minus one.
 	</p></li>
+<li class="listitem"><p>
+	  Zone transfers now use smaller message sizes to improve
+	  message compression. This results in reduced network usage.
+	</p></li>
 </ul></div>
 </div>
 <div class="section">