diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 6bc2ed581efa..87ba1ca83b77 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,7 @@
+2011-10-07  Ian Lance Taylor  <iant@google.com>
+
+	* generic-morestack-thread.c: #include <errno.h>.
+
 2011-10-07  Ian Lance Taylor  <iant@google.com>
 
 	PR target/46093
diff --git a/libgcc/generic-morestack-thread.c b/libgcc/generic-morestack-thread.c
index bc237957ef64..794fdc3dc542 100644
--- a/libgcc/generic-morestack-thread.c
+++ b/libgcc/generic-morestack-thread.c
@@ -1,5 +1,5 @@
 /* Thread library support for -fsplit-stack.  */
-/* Copyright (C) 2009, 2010 Free Software Foundation, Inc.
+/* Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
    Contributed by Ian Lance Taylor <iant@google.com>.
 
 This file is part of GCC.
@@ -36,6 +36,7 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 
 #ifndef inhibit_libc
 
+#include <errno.h>
 #include <pthread.h>
 
 #include "generic-morestack.h"