diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index d83b8086762..4525c8f8e53 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -416,6 +416,8 @@ void EditorNode::_fs_changed() {
 			}
 		}
 	}
+
+	_mark_unsaved_scenes();
 }
 
 void EditorNode::_sources_changed(bool p_exist) {
@@ -978,6 +980,29 @@ void EditorNode::_save_all_scenes() {
 	_save_default_environment();
 }
 
+void EditorNode::_mark_unsaved_scenes() {
+
+	for (int i = 0; i < editor_data.get_edited_scene_count(); i++) {
+
+		Node *node = editor_data.get_edited_scene_root(i);
+		if (!node)
+			continue;
+
+		String path = node->get_filename();
+		if (!(path == String() || FileAccess::exists(path))) {
+
+			node->set_filename("");
+			if (i == editor_data.get_edited_scene())
+				set_current_version(-1);
+			else
+				editor_data.set_edited_scene_version(-1, i);
+		}
+	}
+
+	_update_title();
+	_update_scene_tabs();
+}
+
 void EditorNode::_import_action(const String &p_action) {
 #if 0
 	import_confirmation->hide();
diff --git a/editor/editor_node.h b/editor/editor_node.h
index 5e83cec4a35..24acedbf269 100644
--- a/editor/editor_node.h
+++ b/editor/editor_node.h
@@ -529,6 +529,7 @@ private:
 	bool _find_and_save_resource(RES p_res, Map<RES, bool> &processed, int32_t flags);
 	bool _find_and_save_edited_subresources(Object *obj, Map<RES, bool> &processed, int32_t flags);
 	void _save_edited_subresources(Node *scene, Map<RES, bool> &processed, int32_t flags);
+	void _mark_unsaved_scenes();
 
 	void _find_node_types(Node *p_node, int &count_2d, int &count_3d);
 	void _save_scene_with_preview(String p_file);