diff --git a/winsup/cygwin/release/2.8.1 b/winsup/cygwin/release/2.8.1
index 90b5a66b5..1ebe7d839 100644
--- a/winsup/cygwin/release/2.8.1
+++ b/winsup/cygwin/release/2.8.1
@@ -9,6 +9,9 @@ What's new:
 What changed:
 -------------
 
+- The XSI form of sigpause, which removes the given signal from the process's
+  signal mask, is made available when compiling with _XOPEN_SOURCE or
+  _GNU_SOURCE.
 
 Bug Fixes
 ---------