diff --git a/core/plug-in/stats/StatsUDPServer.cpp b/core/plug-in/stats/StatsUDPServer.cpp
index c78dc10..8d92720 100644
--- a/core/plug-in/stats/StatsUDPServer.cpp
+++ b/core/plug-in/stats/StatsUDPServer.cpp
@@ -26,6 +26,7 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
+#include "sems.h"
 #include "StatsUDPServer.h"
 #include "Statistics.h"
 #include "AmConfigReader.h"