1 files changed, 5 insertions, 0 deletions
diff --git a/reportdesign/source/ui/dlg/GroupsSorting.cxx b/reportdesign/source/ui/dlg/GroupsSorting.cxx
index abd9102c46fa..b3219be00fe0 100644
--- a/reportdesign/source/ui/dlg/GroupsSorting.cxx
+++ b/reportdesign/source/ui/dlg/GroupsSorting.cxx
@@ -77,6 +77,9 @@ using namespace ::comphelper;
   * Separated out from OFieldExpressionControl to prevent collision of ref-counted base classes
   */
 class OFieldExpressionControl;
+
+namespace {
+
 class OFieldExpressionControlContainerListener : public ::cppu::WeakImplHelper< container::XContainerListener >
 {
     VclPtr<OFieldExpressionControl> mpParent;
@@ -91,6 +94,8 @@ public:
     virtual void SAL_CALL elementRemoved(const css::container::ContainerEvent& rEvent) override;
 };
 
+}
+
 class OFieldExpressionControl : public ::svt::EditBrowseBox
 {
     ::osl::Mutex                    m_aMutex;