diff --git a/Userland/Applications/SpaceAnalyzer/TreeMapWidget.h b/Userland/Applications/SpaceAnalyzer/TreeMapWidget.h
index f833e01dc0..d28ac5bea0 100644
--- a/Userland/Applications/SpaceAnalyzer/TreeMapWidget.h
+++ b/Userland/Applications/SpaceAnalyzer/TreeMapWidget.h
@@ -49,7 +49,6 @@ private:
     virtual void context_menu_event(GUI::ContextMenuEvent&) override;
     virtual void keydown_event(GUI::KeyEvent&) override;
 
-    bool rect_can_contain_children(Gfx::IntRect const& rect) const;
     bool rect_can_contain_label(Gfx::IntRect const& rect) const;
 
     enum class HasLabel {