diff --git a/scene/resources/packed_scene.cpp b/scene/resources/packed_scene.cpp
index cd36210855ba..07b8b61b8781 100644
--- a/scene/resources/packed_scene.cpp
+++ b/scene/resources/packed_scene.cpp
@@ -105,6 +105,7 @@ Node *SceneState::instance(GenEditState p_edit_state) const {
 	const NodeData *nd = &nodes[0];
 
 	Node **ret_nodes = (Node **)alloca(sizeof(Node *) * nc);
+	ret_nodes[0] = nullptr; // Sidesteps "maybe uninitialized" false-positives on GCC.
 
 	bool gen_node_path_cache = p_edit_state != GEN_EDIT_STATE_DISABLED && node_path_cache.empty();