diff --git a/src/modules/module-protocol-pulse/collect.c b/src/modules/module-protocol-pulse/collect.c
index fe28fae3b..36f46efdb 100644
--- a/src/modules/module-protocol-pulse/collect.c
+++ b/src/modules/module-protocol-pulse/collect.c
@@ -279,13 +279,13 @@ void collect_device_info(struct pw_manager_object *device, struct pw_manager_obj
 		{
 			struct spa_pod *copy = spa_pod_copy(p->param);
 			spa_pod_fixate(copy);
-			format_parse_param(copy, &dev_info->ss, &dev_info->map,
+			format_parse_param(copy, true, &dev_info->ss, &dev_info->map,
 					&defs->sample_spec, &defs->channel_map);
 			free(copy);
 			break;
 		}
 		case SPA_PARAM_Format:
-			format_parse_param(p->param, &dev_info->ss, &dev_info->map,
+			format_parse_param(p->param, true, &dev_info->ss, &dev_info->map,
 					NULL, NULL);
 			break;
 
diff --git a/src/modules/module-protocol-pulse/format.c b/src/modules/module-protocol-pulse/format.c
index 75acf9c99..f680e55d3 100644
--- a/src/modules/module-protocol-pulse/format.c
+++ b/src/modules/module-protocol-pulse/format.c
@@ -443,7 +443,8 @@ audio_raw_parse_opt(const struct spa_pod *format, struct spa_audio_info_raw *inf
 	return res;
 }
 
-int format_parse_param(const struct spa_pod *param, struct sample_spec *ss, struct channel_map *map,
+int format_parse_param(const struct spa_pod *param, bool collect,
+		struct sample_spec *ss, struct channel_map *map,
 		const struct sample_spec *def_ss, const struct channel_map *def_map)
 {
 	struct spa_audio_info info = { 0 };
@@ -471,11 +472,17 @@ int format_parse_param(const struct spa_pod *param, struct sample_spec *ss, stru
 	{
 		struct spa_audio_info_iec958 iec;
 
+		if (collect)
+			break;
+
 		if (spa_format_audio_iec958_parse(param, &iec) < 0)
 			return -ENOTSUP;
 
 		info.info.raw.format = SPA_AUDIO_FORMAT_S16;
 		info.info.raw.rate = iec.rate;
+		info.info.raw.channels = 2;
+		info.info.raw.position[0] = SPA_AUDIO_CHANNEL_FL;
+		info.info.raw.position[1] = SPA_AUDIO_CHANNEL_FR;
 		break;
 	}
 	default:
diff --git a/src/modules/module-protocol-pulse/format.h b/src/modules/module-protocol-pulse/format.h
index 7f9cf4c93..4300fc08a 100644
--- a/src/modules/module-protocol-pulse/format.h
+++ b/src/modules/module-protocol-pulse/format.h
@@ -205,7 +205,7 @@ void channel_map_to_positions(const struct channel_map *map, uint32_t *pos);
 void channel_map_parse(const char *str, struct channel_map *map);
 bool channel_map_valid(const struct channel_map *map);
 
-int format_parse_param(const struct spa_pod *param, struct sample_spec *ss,
+int format_parse_param(const struct spa_pod *param, bool collect, struct sample_spec *ss,
 		struct channel_map *map, const struct sample_spec *def_ss,
 		const struct channel_map *def_map);
 
diff --git a/src/modules/module-protocol-pulse/pulse-server.c b/src/modules/module-protocol-pulse/pulse-server.c
index e4e77faad..80ec7c93a 100644
--- a/src/modules/module-protocol-pulse/pulse-server.c
+++ b/src/modules/module-protocol-pulse/pulse-server.c
@@ -1062,7 +1062,7 @@ static void stream_param_changed(void *data, uint32_t id, const struct spa_pod *
 	if (id != SPA_PARAM_Format || param == NULL)
 		return;
 
-	if ((res = format_parse_param(param, &stream->ss, &stream->map, NULL, NULL)) < 0) {
+	if ((res = format_parse_param(param, false, &stream->ss, &stream->map, NULL, NULL)) < 0) {
 		pw_stream_set_error(stream->stream, res, "format not supported");
 		return;
 	}