diff --git a/bacnet-stack/src/iam/iam_send.c b/bacnet-stack/src/iam/iam_send.c
index 517cf687..6fcc5262 100755
--- a/bacnet-stack/src/iam/iam_send.c
+++ b/bacnet-stack/src/iam/iam_send.c
@@ -40,6 +40,7 @@
 #include "device.h"
 #include "bacdcode.h"
 #include "address.h"
+#include "iam.h"
 
 int iam_send(uint8_t * buffer)
 {