diff --git a/src/sf_proto.h b/src/sf_proto.h
index 07073b8..c7fa838 100644
--- a/src/sf_proto.h
+++ b/src/sf_proto.h
@@ -25,6 +25,7 @@
 #include "fastcommon/sockopt.h"
 #include "sf_define.h"
 #include "sf_types.h"
+#include "sf_util.h"
 
 #define SF_PROTO_ACK                    116