diff --git a/MQTTSNGateway/src/linux/xbee/SensorNetwork.cpp b/MQTTSNGateway/src/linux/xbee/SensorNetwork.cpp
index 06bd7f7..4be4eae 100644
--- a/MQTTSNGateway/src/linux/xbee/SensorNetwork.cpp
+++ b/MQTTSNGateway/src/linux/xbee/SensorNetwork.cpp
@@ -11,7 +11,7 @@
  *   http://www.eclipse.org/org/documents/edl-v10.php.
  *
  * Contributors:
- *    Tomoaki Yamaguchi - initial API and implementation 
+ *    Tomoaki Yamaguchi - initial API and implementation
  **************************************************************************************/
 
 #include <stdio.h>
@@ -20,6 +20,7 @@
 #include <fcntl.h>
 #include <string.h>
 #include <stdlib.h>
+#include <errno.h>
 #include <sys/time.h>
 #include <sys/types.h>
 #include <sys/select.h>