diff --git a/src/Gui/PreferencePacks/FreeCAD Classic/FreeCAD Classic.cfg b/src/Gui/PreferencePacks/FreeCAD Classic/FreeCAD Classic.cfg
index d32f6eafea..d70940da22 100644
--- a/src/Gui/PreferencePacks/FreeCAD Classic/FreeCAD Classic.cfg	
+++ b/src/Gui/PreferencePacks/FreeCAD Classic/FreeCAD Classic.cfg	
@@ -131,6 +131,7 @@
         <FCParamGroup Name="TreeView">
           <FCUInt Name="TreeActiveColor" Value="1016200447"/>
           <FCUInt Name="TreeEditColor" Value="1588208639"/>
+          <FCInt Name="FontSize" Value="0"/>
         </FCParamGroup>
         <FCParamGroup Name="View">
           <FCBool Name="Gradient" Value="1"/>