diff --git a/src/graphics/ui/GUI.cpp b/src/graphics/ui/GUI.cpp
index 79e9fd63..3ab438b1 100644
--- a/src/graphics/ui/GUI.cpp
+++ b/src/graphics/ui/GUI.cpp
@@ -302,6 +302,7 @@ bool GUI::isFocusCaught() const {
 }
 
 void GUI::add(std::shared_ptr<UINode> node) {
+    UINode::getIndices(node, rootDocument->getMapWriteable());
     container->add(std::move(node));
 }