1 files changed, 3 insertions, 3 deletions

diff --git a/src/blockinput.h b/src/blockinput.h
index 78dce69fe1f..468f0e0c762 100644
--- a/src/blockinput.h
+++ b/src/blockinput.h
@@ -1,6 +1,6 @@
 /* blockinput.h - interface to blocking complicated interrupt-driven input.
-   Copyright (C) 1989, 1993, 2002, 2003, 2004,
-                 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 1989, 1993, 2001, 2002, 2003, 2004,
+                 2005, 2006, 2007  Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -49,7 +49,7 @@ Boston, MA 02110-1301, USA.  */
    interrupt_input_pending to a non-zero value.  If that flag is set
    when input becomes unblocked, UNBLOCK_INPUT will send a new SIGIO.  */
 
-extern int interrupt_input_blocked;
+extern volatile int interrupt_input_blocked;
 
 /* Nonzero means an input interrupt has arrived
    during the current critical section.  */