diff --git a/src/mux_h1.c b/src/mux_h1.c
index f5a237e..670d26e 100644
--- a/src/mux_h1.c
+++ b/src/mux_h1.c
@@ -2482,7 +2482,8 @@
 			h1s->flags |= H1S_F_BUF_FLUSH;
 	}
 	else if (ret > 0 || (h1s->flags & H1S_F_SPLICED_DATA)) {
-		h1s->flags &= ~H1S_F_SPLICED_DATA;
+		if (ret)
+			h1s->flags &= ~H1S_F_SPLICED_DATA;
 		if (!(h1c->wait_event.events & SUB_RETRY_RECV))
 			tasklet_wakeup(h1c->wait_event.tasklet);
 	}