diff --git a/src/mux_h2.c b/src/mux_h2.c
index 00c3fe3c4..06326397a 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -3543,7 +3543,7 @@ static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
 				goto out;
 			}
 
-			error = h2c_dec_hdrs(h2c, h2s_rxbuf_tail(h2s), &h2s->flags, &body_len, NULL);
+			error = h2c_dec_hdrs(h2c, h2s_rxbuf_tail(h2s), &h2s->flags, &h2s->body_len, NULL);
 			/* unrecoverable error ? */
 			if (h2c->st0 >= H2_CS_ERROR) {
 				TRACE_USER("Unrecoverable error decoding H2 trailers", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, h2s_rxbuf_tail(h2s));