diff --git a/winsup/cygwin/release/2.9.1 b/winsup/cygwin/release/2.9.1
index 0a04b2a7d..e01515f1d 100644
--- a/winsup/cygwin/release/2.9.1
+++ b/winsup/cygwin/release/2.9.1
@@ -14,3 +14,6 @@ Bug Fixes
 
 - Fix errno setting bug in posix_fadvise and posix_fallocate.
   Addresses: https://cygwin.com/ml/cygwin-patches/2017-q4/msg00026.html
+
+- Fix two bugs in the limit of large numbers of sockets.
+  Addresses: https://cygwin.com/ml/cygwin/2017-11/msg00052.html