diff --git a/lib/path.cpp b/lib/path.cpp
index f2c4652a2..d58349da1 100644
--- a/lib/path.cpp
+++ b/lib/path.cpp
@@ -378,7 +378,7 @@ int path_prepare(struct vpath *p, NodeList &nodes)
 
 	/* Prepare pool */
 	pool_size = MAX(1UL, vlist_length(&p->destinations)) * p->queuelen;
-	ret = pool_init(&p->pool, pool_size, SAMPLE_LENGTH(vlist_length(&p->signals)), pool_mt);
+	ret = pool_init(&p->pool, pool_size, SAMPLE_LENGTH(vlist_length(path_output_signals(p))), pool_mt);
 
 	if (ret)
 		return ret;
diff --git a/lib/path_source.cpp b/lib/path_source.cpp
index e822d2982..c1e4feca0 100644
--- a/lib/path_source.cpp
+++ b/lib/path_source.cpp
@@ -57,7 +57,7 @@ int path_source_init_master(struct vpath_source *ps, struct vnode *n)
 	if (ps->node->_vt->pool_size)
 		pool_size = ps->node->_vt->pool_size;
 
-	ret = pool_init(&ps->pool, pool_size, SAMPLE_LENGTH(vlist_length(&ps->node->in.signals)), node_memory_type(ps->node));
+	ret = pool_init(&ps->pool, pool_size, SAMPLE_LENGTH(vlist_length(node_input_signals(ps->node))), node_memory_type(ps->node));
 
 	if (ret)
 		return ret;