--- a/parsetime.h	2016-11-02 10:08:53.065941081 +0100
+++ b/parsetime.h	2016-11-02 10:09:37.626940283 +0100
@@ -17,6 +17,10 @@
  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 time_t parsetime(time_t currtime, int argc, char **argv);
 
 extern char *last_token;