--- a/thermferm/lock.c	Sat Jul 12 23:50:48 2014 +0200
+++ b/thermferm/lock.c	Sun Jul 13 17:31:45 2014 +0200
@@ -20,6 +20,7 @@
  * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  *****************************************************************************/
 
+#include "lock.h"
 #include "thermferm.h"
 
 /*