diff --git a/src/osd/modules/debugger/win/disasmwininfo.h b/src/osd/modules/debugger/win/disasmwininfo.h
index e1519605faf..e5a5ceaaa0e 100644
--- a/src/osd/modules/debugger/win/disasmwininfo.h
+++ b/src/osd/modules/debugger/win/disasmwininfo.h
@@ -29,7 +29,7 @@ protected:
 	virtual void recompute_children() override;
 	virtual bool handle_command(WPARAM wparam, LPARAM lparam) override;
 	virtual void draw_contents(HDC dc) override;
-	virtual void save_configuration_to_node(util::xml::data_node &node);
+	virtual void save_configuration_to_node(util::xml::data_node &node) override;
 
 private:
 	virtual void process_string(const std::string &string) override;