diff --git a/src/mux_h2.c b/src/mux_h2.c
index 2a5d9e41a..16ed74305 100644
--- a/src/mux_h2.c
+++ b/src/mux_h2.c
@@ -2585,6 +2585,7 @@ static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
 			error = h2c_decode_headers(h2c, &h2s->rxbuf, &h2s->flags, &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, &rxbuf);
 				sess_log(h2c->conn->owner);
 				goto out;
 			}
@@ -2602,6 +2603,7 @@ static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
 				 */
 				sess_log(h2c->conn->owner);
 				h2s_error(h2s, H2_ERR_INTERNAL_ERROR);
+				TRACE_USER("Stream error decoding H2 trailers", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
 				h2c->st0 = H2_CS_FRAME_E;
 				goto out;
 			}
@@ -2630,6 +2632,7 @@ static struct h2s *h2c_frt_handle_headers(struct h2c *h2c, struct h2s *h2s)
 
 	/* unrecoverable error ? */
 	if (h2c->st0 >= H2_CS_ERROR) {
+		TRACE_USER("Unrecoverable error decoding H2 request", H2_EV_RX_FRAME|H2_EV_RX_HDR|H2_EV_STRM_NEW|H2_EV_STRM_END, h2c->conn, 0, &rxbuf);
 		sess_log(h2c->conn->owner);
 		goto out;
 	}
@@ -2747,8 +2750,10 @@ static struct h2s *h2c_bck_handle_headers(struct h2c *h2c, struct h2s *h2s)
 	}
 
 	/* unrecoverable error ? */
-	if (h2c->st0 >= H2_CS_ERROR)
+	if (h2c->st0 >= H2_CS_ERROR) {
+		TRACE_USER("Unrecoverable error decoding H2 HEADERS", H2_EV_RX_FRAME|H2_EV_RX_HDR, h2c->conn, h2s);
 		goto fail;
+	}
 
 	if (h2s->st != H2_SS_OPEN && h2s->st != H2_SS_HLOC) {
 		/* RFC7540#5.1 */