diff --git a/lib/includes/spdylay/spdylay.h b/lib/includes/spdylay/spdylay.h
index 623021f2..01d75d8c 100644
--- a/lib/includes/spdylay/spdylay.h
+++ b/lib/includes/spdylay/spdylay.h
@@ -1430,6 +1430,25 @@ size_t spdylay_session_get_outbound_queue_size(spdylay_session *session);
  */
 uint8_t spdylay_session_get_pri_lowest(spdylay_session *session);
 
+/*
+ * @function
+ *
+ * Submits GOAWAY frame.  The status code |status_code| is ignored if
+ * the protocol version is :macro:`SPDYLAY_PROTO_SPDY2`.
+ *
+ * This function should be called when the connection should be
+ * terminated after sending GOAWAY. If the remaining streams should be
+ * processed after GOAWAY, use `spdylay_submit_goaway()` instead.
+ *
+ * This function returns 0 if it succeeds, or one of the following
+ * negative error codes:
+ *
+ * :enum:`SPDYLAY_ERR_NOMEM`
+ *     Out of memory.
+ */
+int spdylay_session_fail_session(spdylay_session *session,
+                                 uint32_t status_code);
+
 /**
  * @function
  *
diff --git a/lib/spdylay_session.c b/lib/spdylay_session.c
index aaaf2551..52199beb 100644
--- a/lib/spdylay_session.c
+++ b/lib/spdylay_session.c
@@ -63,13 +63,8 @@ static int spdylay_is_fatal(int error)
   return error < SPDYLAY_ERR_FATAL;
 }
 
-/*
- * This function should be called when the session wants to drop
- * connection after sending GOAWAY. These cases are called as the
- * session error.  For example, when it receives bad zlib data.
- */
-static int spdylay_session_fail_session(spdylay_session *session,
-                                        uint32_t status_code)
+int spdylay_session_fail_session(spdylay_session *session,
+                                 uint32_t status_code)
 {
   session->goaway_flags |= SPDYLAY_GOAWAY_FAIL_ON_SEND;
   return spdylay_submit_goaway(session, status_code);