diff --git a/Library/MeasureNet.h b/Library/MeasureNet.h
index 1c3fee63..f6b921ee 100644
--- a/Library/MeasureNet.h
+++ b/Library/MeasureNet.h
@@ -20,6 +20,7 @@
 #define __MEASURENET_H__
 
 #include "Measure.h"
+#include <Iphlpapi.h>
 
 //
 // Medium the Ndis Driver is running on (OID_GEN_MEDIA_SUPPORTED/ OID_GEN_MEDIA_IN_USE).