diff --git a/documentation/RELEASE_NOTES.html b/documentation/RELEASE_NOTES.html
index 05132dd45..4958fb27f 100644
--- a/documentation/RELEASE_NOTES.html
+++ b/documentation/RELEASE_NOTES.html
@@ -34,7 +34,9 @@ CAS code has been fixed.</p>
 <h3>Support for Apple Xcode 5.0</h3>
 
 <p>This adds the ability to build for iOS 7.0 and the ARMv8 64-bit CPU on the
-newest iPhone 5S device.</p>
+newest iPhone 5S device. Unfortunately the Xcode upgrade breaks the build of the
+ios-x86 simulator target, although the ios-arm target successfully builds code
+which runs fine on the real hardware.</p>
 
 <h3>Reading TSEL field</h3>