diff --git a/winsup/doc/ChangeLog b/winsup/doc/ChangeLog
index bdae2d2f0..d936503e7 100644
--- a/winsup/doc/ChangeLog
+++ b/winsup/doc/ChangeLog
@@ -1,3 +1,7 @@
+2011-02-10  Eric Blake  <eblake@redhat.com>
+
+	* new-features.sgml (ov-new1.7.8): Document strerror_r fixes.
+
 2011-02-10  Yaakov Selkowitz  <yselkowitz@users.sourceforge.net>
 
 	* new-features.sgml (ov-new1.7.8): Document pthread_yield.
diff --git a/winsup/doc/new-features.sgml b/winsup/doc/new-features.sgml
index eb08885fc..1179fe506 100644
--- a/winsup/doc/new-features.sgml
+++ b/winsup/doc/new-features.sgml
@@ -41,6 +41,13 @@ the specified language, and the "@cjknarrow" locale modifier can still be used
 to force width 1.)
 </para></listitem>
 
+<listitem><para>
+The strerror_r interface now has two flavors; if _GNU_SOURCE is
+defined, it retains the previous behavior of returning char *
+(but the result is now guaranteed to be NUL-terminated); otherwise
+it now obeys POSIX semantics of returning int.
+</para></listitem>
+
 <listitem><para>
 Other new APIs: llround, llroundf, madvise, pthread_yield.
 Export program_invocation_name, program_invocation_short_name.