1 files changed, 2 insertions, 2 deletions
diff --git a/chart2/source/controller/inc/ObjectHierarchy.hxx b/chart2/source/controller/inc/ObjectHierarchy.hxx
index 1c6f0761fa33..76a694dac9f0 100644
--- a/chart2/source/controller/inc/ObjectHierarchy.hxx
+++ b/chart2/source/controller/inc/ObjectHierarchy.hxx
@@ -50,7 +50,7 @@ public:
      */
     explicit ObjectHierarchy(
         const css::uno::Reference< css::chart2::XChartDocument > & xChartDocument,
-        ExplicitValueProvider * pExplicitValueProvider = nullptr,
+        ExplicitValueProvider * pExplicitValueProvider,
         bool bFlattenDiagram = false,
         bool bOrderingForElementSelector = false );
     ~ObjectHierarchy();
@@ -80,7 +80,7 @@ class ObjectKeyNavigation
 public:
     explicit ObjectKeyNavigation( const ObjectIdentifier & rCurrentOID,
                                   const css::uno::Reference< css::chart2::XChartDocument > & xChartDocument,
-                                  ExplicitValueProvider * pExplicitValueProvider = nullptr );
+                                  ExplicitValueProvider * pExplicitValueProvider );
 
     bool handleKeyEvent( const css::awt::KeyEvent & rEvent );
     const ObjectIdentifier& getCurrentSelection() const { return m_aCurrentOID;}