diff --git a/src/modules/module-avb/stream.c b/src/modules/module-avb/stream.c
index 682c843bf..589101ae4 100644
--- a/src/modules/module-avb/stream.c
+++ b/src/modules/module-avb/stream.c
@@ -877,6 +877,10 @@ static void on_socket_data(void *data, int fd, uint32_t mask)
 						(struct avb_packet_iec61883 *)ph,
 						len - (int)sizeof(*h));
 				break;
+			case AVB_SUBTYPE_CRF:
+				/* CRF clock-reference stream: no audio data plane.
+				 * Consume and ignore (clock recovery is future work). */
+				break;
 			default:
 				pw_log_warn("unsupported subtype 0x%02x", ph->subtype);
 				break;
diff --git a/src/modules/module-avb/stream.h b/src/modules/module-avb/stream.h
index 87c623732..7b3895f5a 100644
--- a/src/modules/module-avb/stream.h
+++ b/src/modules/module-avb/stream.h
@@ -37,6 +37,7 @@ struct stream {
 	struct spa_source *source;
 	struct spa_source *flush_timer;
 	uint64_t flush_last_ns;
+	bool is_crf;
 	int prio;
 	int mtt;
 	int t_uncertainty;