diff --git a/src/zm_zone.cpp b/src/zm_zone.cpp
index e25d5ffc8..b62ad41fe 100644
--- a/src/zm_zone.cpp
+++ b/src/zm_zone.cpp
@@ -17,12 +17,15 @@
 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 // 
 
+#define __STDC_FORMAT_MACROS 1
+#include <cinttypes>
 #include "zm.h"
 #include "zm_db.h"
 #include "zm_zone.h"
 #include "zm_image.h"
 #include "zm_monitor.h"
 
+
 void Zone::Setup( 
   Monitor *p_monitor,
   int p_id,