diff --git a/src/linkgraph/linkgraph_gui.cpp b/src/linkgraph/linkgraph_gui.cpp
--- a/src/linkgraph/linkgraph_gui.cpp
+++ b/src/linkgraph/linkgraph_gui.cpp
@@ -553,7 +553,7 @@ LinkGraphLegendWindow::LinkGraphLegendWi
 {
 	this->InitNested(window_number);
 	this->InvalidateData(0);
-	this->SetOverlay(FindWindowById(WC_MAIN_WINDOW, 0)->viewport->overlay);
+	this->SetOverlay(GetMainWindow()->viewport->overlay);
 }
 
 /**