diff --git a/lib/includes/spdylay/spdylay.h b/lib/includes/spdylay/spdylay.h
index 750edbe..843eceb 100644
--- a/lib/includes/spdylay/spdylay.h
+++ b/lib/includes/spdylay/spdylay.h
@@ -856,12 +856,14 @@ typedef void (*spdylay_on_ctrl_recv_callback)
  * @functypedef
  *
  * Callback function invoked by `spdylay_session_recv()` when an
- * invalid control frame is received. When this callback function is
- * invoked, either RST_STREAM or GOAWAY will be sent.
+ * invalid control frame is received. The |status_code| is one of the
+ * :enum:`spdylay_status_code` and indicates the error. When this
+ * callback function is invoked, either RST_STREAM or GOAWAY will be
+ * sent.
  */
 typedef void (*spdylay_on_invalid_ctrl_recv_callback)
 (spdylay_session *session, spdylay_frame_type type, spdylay_frame *frame,
- void *user_data);
+ uint32_t status_code, void *user_data);
 
 /**
  * @functypedef
diff --git a/lib/spdylay_session.c b/lib/spdylay_session.c
index 7811c78..7b08e7b 100644
--- a/lib/spdylay_session.c
+++ b/lib/spdylay_session.c
@@ -1630,7 +1630,7 @@ static int spdylay_session_handle_invalid_stream
   }
   if(session->callbacks.on_invalid_ctrl_recv_callback) {
     session->callbacks.on_invalid_ctrl_recv_callback
-      (session, type, frame, session->user_data);
+      (session, type, frame, status_code, session->user_data);
   }
   return 0;
 }
@@ -1659,6 +1659,7 @@ int spdylay_session_on_syn_stream_received(spdylay_session *session,
       session->callbacks.on_invalid_ctrl_recv_callback(session,
                                                        SPDYLAY_SYN_STREAM,
                                                        frame,
+                                                       SPDYLAY_PROTOCOL_ERROR,
                                                        session->user_data);
     }
     return spdylay_session_fail_session(session, SPDYLAY_GOAWAY_PROTOCOL_ERROR);
diff --git a/tests/spdylay_session_test.c b/tests/spdylay_session_test.c
index a8c62d2..24d2fc8 100644
--- a/tests/spdylay_session_test.c
+++ b/tests/spdylay_session_test.c
@@ -128,6 +128,7 @@ static void on_ctrl_recv_callback(spdylay_session *session,
 static void on_invalid_ctrl_recv_callback(spdylay_session *session,
                                           spdylay_frame_type type,
                                           spdylay_frame *frame,
+                                          uint32_t status_code,
                                           void *user_data)
 {
   my_user_data *ud = (my_user_data*)user_data;