diff --git a/src/pacemaker.h b/src/pacemaker.h
index ccc8861..3a81724 100644
--- a/src/pacemaker.h
+++ b/src/pacemaker.h
@@ -1,39 +1,39 @@
 /* 
  * Copyright (C) 2011 Jiaju Zhang <jjzhang@suse.de>
  * Copyright (C) 2013-2014 Philipp Marek <philipp.marek@linbit.com>
  * 
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  * 
  * This software is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * General Public License for more details.
  * 
  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #ifndef _PACEMAKER_H
 #define _PACEMAKER_H
 
 #include <stdint.h>
 #include "config.h"
 
 struct ticket_handler {
 	int (*grant_ticket) (struct ticket_config *tk);
 	int (*revoke_ticket) (struct ticket_config *tk);
 	int (*load_ticket) (struct ticket_config *tk);
 	int (*set_attr) (struct ticket_config *tk, const char *a, const char *v);
 	int (*get_attr) (struct ticket_config *tk, const char *a, const char **vp);
 	int (*del_attr) (struct ticket_config *tk, const char *a);
 };
 
-struct ticket_handler pcmk_handler;
+extern struct ticket_handler pcmk_handler;
 const char * interpret_rv(int rv);
 
 
 #endif /* _PACEMAKER_H */