diff --git a/bacnet-stack/handlers.c b/bacnet-stack/handlers.c
index b3843f17..26861d6f 100644
--- a/bacnet-stack/handlers.c
+++ b/bacnet-stack/handlers.c
@@ -38,6 +38,7 @@
 #include "rp.h"
 #include "wp.h"
 #include "whois.h"
+#include "iam.h"
 #include "reject.h"
 #include "abort.h"
 #include "bacerror.h"