diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 60fe14d03..65cbdb002 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2012-03-19  Christopher Faylor  <me.cygwin2012@cgf.cx>
+
+	* cygserver_ipc.h: Include sigproc.h for signal_arrived declaration.
+
 2012-03-19  Christopher Faylor  <me.cygwin2012@cgf.cx>
 
 	* cygprops.h: Use #pragma once.
diff --git a/winsup/cygwin/cygserver_ipc.h b/winsup/cygwin/cygserver_ipc.h
index d25a3bdeb..2f7c3531f 100644
--- a/winsup/cygwin/cygserver_ipc.h
+++ b/winsup/cygwin/cygserver_ipc.h
@@ -1,6 +1,6 @@
 /* cygserver_ipc.h
 
-   Copyright 2002, 2003, 2004 Red Hat, Inc.
+   Copyright 2002, 2003, 2004, 2012 Red Hat, Inc.
 
 This file is part of Cygwin.
 
@@ -32,6 +32,7 @@ struct proc {
 };
 
 #ifdef __INSIDE_CYGWIN__
+#include "sigproc.h"
 inline void
 ipc_set_proc_info (proc &blk)
 {