diff --git a/spa/plugins/filter-graph/filter-graph.c b/spa/plugins/filter-graph/filter-graph.c
index 246c1ae53..1b0936459 100644
--- a/spa/plugins/filter-graph/filter-graph.c
+++ b/spa/plugins/filter-graph/filter-graph.c
@@ -2204,6 +2204,10 @@ static int load_graph(struct graph *graph, const struct spa_dict *props)
 		if ((res = load_node(graph, &it[1])) < 0)
 			return res;
 	}
+	if (spa_list_is_empty(&graph->node_list)) {
+		spa_log_error(impl->log, "filter.graph has no nodes");
+		return -EINVAL;
+	}
 	if (plinks != NULL) {
 		while (spa_json_enter_object(plinks, &it[1]) > 0) {
 			if ((res = parse_link(graph, &it[1])) < 0)
@@ -2256,7 +2260,6 @@ static int load_graph(struct graph *graph, const struct spa_dict *props)
 	else
 		graph->default_outputs = last->desc->n_output;
 
-
 	return 0;
 }
 
diff --git a/src/modules/module-filter-chain.c b/src/modules/module-filter-chain.c
index acfc85ed0..1c803f4fd 100644
--- a/src/modules/module-filter-chain.c
+++ b/src/modules/module-filter-chain.c
@@ -1619,7 +1619,7 @@ static const struct pw_stream_events out_stream_events = {
 
 static int setup_streams(struct impl *impl)
 {
-	int res;
+	int res = 0;
 	uint32_t i, n_params, *offs, flags;
 	struct pw_array offsets;
 	const struct spa_pod **params = NULL;