diff --git a/chart2/source/controller/sidebar/Chart2PanelFactory.cxx b/chart2/source/controller/sidebar/Chart2PanelFactory.cxx
index b5bde521d031..081322b09408 100644
--- a/chart2/source/controller/sidebar/Chart2PanelFactory.cxx
+++ b/chart2/source/controller/sidebar/Chart2PanelFactory.cxx
@@ -40,7 +40,6 @@ using namespace css::uno;
 namespace chart::sidebar {
 
 ChartPanelFactory::ChartPanelFactory()
-    : PanelFactoryInterfaceBase(m_aMutex)
 {
 }
 
diff --git a/chart2/source/controller/sidebar/Chart2PanelFactory.hxx b/chart2/source/controller/sidebar/Chart2PanelFactory.hxx
index b218f4e41ebc..87619f647d70 100644
--- a/chart2/source/controller/sidebar/Chart2PanelFactory.hxx
+++ b/chart2/source/controller/sidebar/Chart2PanelFactory.hxx
@@ -18,21 +18,19 @@
  */
 #pragma once
 
-#include <cppuhelper/compbase.hxx>
-#include <cppuhelper/basemutex.hxx>
+#include <comphelper/compbase.hxx>
 #include <com/sun/star/lang/XServiceInfo.hpp>
 #include <com/sun/star/ui/XUIElementFactory.hpp>
 
 
 namespace chart::sidebar {
 
-typedef ::cppu::WeakComponentImplHelper <
+typedef comphelper::WeakComponentImplHelper <
     css::ui::XUIElementFactory, css::lang::XServiceInfo
     > PanelFactoryInterfaceBase;
 
-class ChartPanelFactory
-    : private ::cppu::BaseMutex,
-      public PanelFactoryInterfaceBase
+class ChartPanelFactory final
+    : public PanelFactoryInterfaceBase
 {
 public:
     ChartPanelFactory();