diff --git a/src/Mod/Arch/InitGui.py b/src/Mod/Arch/InitGui.py
index d94817c448..9d71d6bd27 100644
--- a/src/Mod/Arch/InitGui.py
+++ b/src/Mod/Arch/InitGui.py
@@ -214,6 +214,8 @@ class ArchWorkbench(FreeCADGui.Workbench):
                 FreeCADGui.addPreferencePage(":/ui/preferences-archdefaults.ui", QT_TRANSLATE_NOOP("QObject", "Arch"))
                 FreeCADGui.draftToolBar.loadedArchPreferences = True
             if not hasattr(FreeCADGui.draftToolBar, "loadedPreferences"):
+                from draftutils import params
+                params._param_observer_start()
                 FreeCADGui.addPreferencePage(":/ui/preferences-draft.ui", QT_TRANSLATE_NOOP("QObject", "Draft"))
                 FreeCADGui.addPreferencePage(":/ui/preferences-draftsnap.ui", QT_TRANSLATE_NOOP("QObject", "Draft"))
                 FreeCADGui.addPreferencePage(":/ui/preferences-draftvisual.ui", QT_TRANSLATE_NOOP("QObject", "Draft"))