diff --git a/src/mux_h2.c b/src/mux_h2.c
index b58ba20..a1da041 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -2753,7 +2753,7 @@
 
 	ret = max ? conn->xprt->rcv_buf(conn, conn->xprt_ctx, buf, max, 0) : 0;
 
-	if (h2_recv_allowed(h2c) && (b_data(buf) < buf->size))
+	if (max && !ret && h2_recv_allowed(h2c))
 		conn->xprt->subscribe(conn, conn->xprt_ctx, SUB_RETRY_RECV, &h2c->wait_event);
 
 	if (!b_data(buf)) {