diff --git a/spa/plugins/audioconvert/fmtconvert.c b/spa/plugins/audioconvert/fmtconvert.c
index ebea18f4c..8b91ccfbe 100644
--- a/spa/plugins/audioconvert/fmtconvert.c
+++ b/spa/plugins/audioconvert/fmtconvert.c
@@ -479,7 +479,7 @@ impl_node_port_enum_params(void *object, int seq,
 	struct port *port, *other;
 	struct spa_pod *param;
 	struct spa_pod_builder b = { 0 };
-	uint8_t buffer[1024];
+	uint8_t buffer[4096];
 	struct spa_result_node_params result;
 	uint32_t count = 0;
 	int res;
diff --git a/spa/plugins/audioconvert/merger.c b/spa/plugins/audioconvert/merger.c
index 5fcb3366a..8e4f2a041 100644
--- a/spa/plugins/audioconvert/merger.c
+++ b/spa/plugins/audioconvert/merger.c
@@ -739,7 +739,7 @@ impl_node_port_enum_params(void *object, int seq,
 	struct port *port;
 	struct spa_pod *param;
 	struct spa_pod_builder b = { 0 };
-	uint8_t buffer[1024];
+	uint8_t buffer[2048];
 	struct spa_result_node_params result;
 	uint32_t count = 0;
 	int res;
diff --git a/spa/plugins/audioconvert/splitter.c b/spa/plugins/audioconvert/splitter.c
index dd1e22629..b5c5ca2af 100644
--- a/spa/plugins/audioconvert/splitter.c
+++ b/spa/plugins/audioconvert/splitter.c
@@ -493,7 +493,7 @@ impl_node_port_enum_params(void *object, int seq,
 	struct port *port;
 	struct spa_pod *param;
 	struct spa_pod_builder b = { 0 };
-	uint8_t buffer[1024];
+	uint8_t buffer[2048];
 	struct spa_result_node_params result;
 	uint32_t count = 0;
 	int res;