diff --git a/src/mux_h1.c b/src/mux_h1.c
index b350e06..1681861 100644
--- a/src/mux_h1.c
+++ b/src/mux_h1.c
@@ -585,7 +585,8 @@
 		if ((h1s->meth == HTTP_METH_CONNECT && h1s->status == 200) ||
 		    h1s->status == 101)
 			h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_TUN;
-		else if (!(h1m->flags & H1_MF_XFER_LEN)) /* no length known => close */
+		else if (!(h1m->flags & H1_MF_XFER_LEN) || /* no length known => close */
+			 (h1m->flags & H1_MF_CONN_CLO && h1s->req.state != H1_MSG_DONE)) /*explicit close and unfinished request */
 			h1s->flags = (h1s->flags & ~H1S_F_WANT_MSK) | H1S_F_WANT_CLO;
 	}
 	else {