diff --git a/bacnet-stack/demo/handler/h_arf.c b/bacnet-stack/demo/handler/h_arf.c
index ffcd80ad..a35d36ce 100644
--- a/bacnet-stack/demo/handler/h_arf.c
+++ b/bacnet-stack/demo/handler/h_arf.c
@@ -30,6 +30,7 @@
 #include "config.h"
 #include "txbuf.h"
 #include "bacdef.h"
+#include "bacerror.h"
 #include "bacdcode.h"
 #include "apdu.h"
 #include "npdu.h"