diff --git a/src/gprs_ms.h b/src/gprs_ms.h
index 781dd59..688708e 100644
--- a/src/gprs_ms.h
+++ b/src/gprs_ms.h
@@ -26,6 +26,7 @@
 #include "cxx_linuxlist.h"
 #include "llc.h"
 #include "tbf.h"
+#include "tbf_dl.h"
 #include "pcu_l1_if.h"
 #include <gprs_coding_scheme.h>