diff --git a/src/bacnet/basic/object/netport.h b/src/bacnet/basic/object/netport.h
index d2d7f335..1c516a07 100644
--- a/src/bacnet/basic/object/netport.h
+++ b/src/bacnet/basic/object/netport.h
@@ -40,6 +40,7 @@
 #include "bacnet/bacdef.h"
 /* BACnet Stack API */
 #include "bacnet/apdu.h"
+#include "bacnet/readrange.h"
 #include "bacnet/rp.h"
 #include "bacnet/wp.h"