diff --git a/winsup/cygwin/release/2.8.1 b/winsup/cygwin/release/2.8.1
index aa486d094..90b5a66b5 100644
--- a/winsup/cygwin/release/2.8.1
+++ b/winsup/cygwin/release/2.8.1
@@ -33,3 +33,6 @@ Bug Fixes
 
 - Fix crash if env var name starts with non-ASCII char
   Addresses: https://cygwin.com/ml/cygwin/2017-05/msg00330.html
+
+- Fix return value of lrint{f,l} on x86_64 Cygwin.
+  Addresses: https://cygwin.com/ml/cygwin/2017-05/msg00388.html