diff --git a/bacnet-stack/bin/bacrpd.sh b/bacnet-stack/bin/bacrpd.sh
index 43a93f05..f62a3f00 100644
--- a/bacnet-stack/bin/bacrpd.sh
+++ b/bacnet-stack/bin/bacrpd.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 PROG=`basename $0`
-OPTIONAL=1
+OPTIONAL=0
 
 usage()
 {
diff --git a/bacnet-stack/demo/mstpcap/main.c b/bacnet-stack/demo/mstpcap/main.c
index 61bf51dc..d4035003 100644
--- a/bacnet-stack/demo/mstpcap/main.c
+++ b/bacnet-stack/demo/mstpcap/main.c
@@ -641,3 +641,4 @@ int main(
         }
     }
 }
+
diff --git a/bacnet-stack/ports/linux/mstpsnap.c b/bacnet-stack/ports/linux/mstpsnap.c
index 8696e16f..71edcf93 100644
--- a/bacnet-stack/ports/linux/mstpsnap.c
+++ b/bacnet-stack/ports/linux/mstpsnap.c
@@ -45,6 +45,7 @@
 #include "rs485.h"
 #include "crc.h"
 #include "mstp.h"
+#include "dlmstp.h"
 #include "mstptext.h"
 #include "bacint.h"