diff --git a/spa/plugins/audioconvert/audioadapter.c b/spa/plugins/audioconvert/audioadapter.c
index 213afe9e3..569677053 100644
--- a/spa/plugins/audioconvert/audioadapter.c
+++ b/spa/plugins/audioconvert/audioadapter.c
@@ -66,7 +66,7 @@ struct impl {
 
 	uint64_t info_all;
 	struct spa_node_info info;
-	struct spa_param_info params[5];
+	struct spa_param_info params[6];
 
 	struct spa_hook_list hooks;
 	struct spa_callbacks callbacks;
@@ -993,9 +993,10 @@ impl_init(const struct spa_handle_factory *factory,
 	this->params[1] = SPA_PARAM_INFO(SPA_PARAM_PropInfo, SPA_PARAM_INFO_READ);
 	this->params[2] = SPA_PARAM_INFO(SPA_PARAM_Props, SPA_PARAM_INFO_READWRITE);
 	this->params[3] = SPA_PARAM_INFO(SPA_PARAM_Format, SPA_PARAM_INFO_WRITE);
-	this->params[4] = SPA_PARAM_INFO(SPA_PARAM_PortConfig, SPA_PARAM_INFO_WRITE);
+	this->params[4] = SPA_PARAM_INFO(SPA_PARAM_EnumPortConfig, SPA_PARAM_INFO_READ);
+	this->params[5] = SPA_PARAM_INFO(SPA_PARAM_PortConfig, SPA_PARAM_INFO_READWRITE);
 	this->info.params = this->params;
-	this->info.n_params = 5;
+	this->info.n_params = 6;
 
 	spa_node_add_listener(this->slave,
 			&this->slave_listener, &slave_node_events, this);