diff --git a/src/mux_h1.c b/src/mux_h1.c
index c8031a2..259a30b 100644
--- a/src/mux_h1.c
+++ b/src/mux_h1.c
@@ -42,13 +42,13 @@
 /* Flags indicating why reading input data are blocked. */
 #define H1C_F_IN_ALLOC       0x00000010 /* mux is blocked on lack of input buffer */
 #define H1C_F_IN_FULL        0x00000020 /* mux is blocked on input buffer full */
-#define H1C_F_IN_BUSY        0x00000040
+#define H1C_F_IN_BUSY        0x00000040 /* mux is blocked on input waiting the other side */
 /* 0x00000040 - 0x00000400 unused */
 
 #define H1C_F_CS_WAIT_CONN   0x00000800 /* waiting for the connection establishment */
 #define H1C_F_CS_ERROR       0x00001000 /* connection must be closed ASAP because an error occurred */
 #define H1C_F_CS_SHUTW_NOW   0x00002000 /* connection must be shut down for writes ASAP */
-#define H1C_F_CS_SHUTDOWN    0x00004000 /* connection is shut down for read and writes */
+#define H1C_F_CS_SHUTDOWN    0x00004000 /* connection is shut down */
 #define H1C_F_CS_IDLE        0x00008000 /* connection is idle and may be reused
 					 * (exclusive to all H1C_F_CS flags and never set when an h1s is attached) */
 
@@ -2375,9 +2375,7 @@
 		return;
 	if (conn_xprt_ready(cs->conn) && cs->conn->xprt->shutr)
 		cs->conn->xprt->shutr(cs->conn, cs->conn->xprt_ctx,
-		    (mode == CS_SHR_DRAIN));
-	if ((cs->conn->flags & (CO_FL_SOCK_RD_SH|CO_FL_SOCK_WR_SH)) == (CO_FL_SOCK_RD_SH|CO_FL_SOCK_WR_SH))
-		h1c->flags = (h1c->flags & ~H1C_F_CS_SHUTW_NOW) | H1C_F_CS_SHUTDOWN;
+				      (mode == CS_SHR_DRAIN));
 }
 
 static void h1_shutw(struct conn_stream *cs, enum cs_shw_mode mode)
@@ -2410,8 +2408,7 @@
 
 	conn_xprt_shutw(conn);
 	conn_sock_shutw(conn, (mode == CS_SHW_NORMAL));
-	if ((conn->flags & (CO_FL_SOCK_RD_SH|CO_FL_SOCK_WR_SH)) == (CO_FL_SOCK_RD_SH|CO_FL_SOCK_WR_SH))
-		h1c->flags = (h1c->flags & ~H1C_F_CS_SHUTW_NOW) | H1C_F_CS_SHUTDOWN;
+	h1c->flags = (h1c->flags & ~H1C_F_CS_SHUTW_NOW) | H1C_F_CS_SHUTDOWN;
 }
 
 /* Called from the upper layer, to unsubscribe to events */