diff --git a/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx
index dcc017710cc5..a7872c7cbcde 100644
--- a/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx
+++ b/desktop/source/deployment/gui/dp_gui_updateinstalldialog.cxx
@@ -81,7 +81,7 @@ namespace dp_gui {
 class UpdateInstallDialog::Thread: public salhelper::Thread {
     friend class UpdateCommandEnv;
 public:
-    Thread(cssu::Reference< cssu::XComponentContext > ctx,
+    Thread(cssu::Reference< cssu::XComponentContext > const & ctx,
         UpdateInstallDialog & dialog, std::vector< dp_gui::UpdateData > & aVecUpdateData);
 
     void stop();
@@ -146,7 +146,7 @@ public:
 
 
 UpdateInstallDialog::Thread::Thread(
-    cssu::Reference< cssu::XComponentContext> xCtx,
+    cssu::Reference< cssu::XComponentContext> const & xCtx,
     UpdateInstallDialog & dialog,
     std::vector< dp_gui::UpdateData > & aVecUpdateData):
     salhelper::Thread("dp_gui_updateinstalldialog"),
diff --git a/desktop/source/migration/migration_impl.hxx b/desktop/source/migration/migration_impl.hxx
index 95e63d0880cd..9ad6f7de2d76 100644
--- a/desktop/source/migration/migration_impl.hxx
+++ b/desktop/source/migration/migration_impl.hxx
@@ -104,7 +104,7 @@ struct MigrationItem
     MigrationItem(const OUString& sParentNodeName,
         const OUString& sPrevSibling,
         const OUString& sCommandURL,
-        const css::uno::Reference< css::container::XIndexContainer > xPopupMenu)
+        const css::uno::Reference< css::container::XIndexContainer > & xPopupMenu)
     {
         m_sParentNodeName = sParentNodeName;
         m_sPrevSibling    = sPrevSibling;