diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7dfe5f49b32..534b74296aa 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2010-11-24  Joseph Myers  <joseph@codesourcery.com>
+
+	* toplev.c: Include <signal.h>.
+
 2010-11-24  Richard Guenther  <rguenther@suse.de>
 
 	PR lto/43218
diff --git a/gcc/toplev.c b/gcc/toplev.c
index 0d8cd137ec9..06a73bd3a55 100644
--- a/gcc/toplev.c
+++ b/gcc/toplev.c
@@ -28,6 +28,7 @@ along with GCC; see the file COPYING3.  If not see
 #include "system.h"
 #include "coretypes.h"
 #include "tm.h"
+#include <signal.h>
 
 #ifdef HAVE_SYS_TIMES_H
 # include <sys/times.h>