diff --git a/winsup/cygwin/release/2.5.2 b/winsup/cygwin/release/2.5.2
index 0ea77206f..c60f0fc03 100644
--- a/winsup/cygwin/release/2.5.2
+++ b/winsup/cygwin/release/2.5.2
@@ -14,3 +14,6 @@ Bug Fixes
 
 - Fix non-POSIXy scheduler priority handling.
   Addresses: Bugreport via private email
+
+- Allow mmap to map regions > 4 Gigs on 64 bit.
+  Addresses: https://cygwin.com/ml/cygwin/2016-05/msg00140.html