diff --git a/cui/source/tabpages/border.cxx b/cui/source/tabpages/border.cxx
index a79868299d7a..89bd14f69b3d 100644
--- a/cui/source/tabpages/border.cxx
+++ b/cui/source/tabpages/border.cxx
@@ -1011,7 +1011,7 @@ void SvxBorderTabPage::FillValueSets()
 }
 
 // ============================================================================
-Color lcl_mediumColor( Color aMain, Color /*aDefault*/ )
+static Color lcl_mediumColor( Color aMain, Color /*aDefault*/ )
 {
     return SvxBorderLine::threeDMediumColor( aMain );
 }