diff --git a/space_view3d_pie_menus/__init__.py b/space_view3d_pie_menus/__init__.py
index e05f17e5f8d3a306c9e3573d5eb8f6fd23c458eb..7adf5db890891109eb5967310131832749ad16f5 100644
--- a/space_view3d_pie_menus/__init__.py
+++ b/space_view3d_pie_menus/__init__.py
@@ -90,7 +90,7 @@ def get_addon_preferences(name=''):
                     cls = _get_pref_class(mod)
                     if cls:
                         prop = PointerProperty(type=cls)
-                        setattr(UIToolsPreferences, name, prop)
+                        setattr(PieToolsPreferences, name, prop)
                         bpy.utils.unregister_class(PieToolsPreferences)
                         bpy.utils.register_class(PieToolsPreferences)
         return getattr(addon_prefs, name, None)
@@ -113,11 +113,11 @@ def unregister_submodule(mod):
 
         prefs = get_addon_preferences()
         name = mod.__name__.split('.')[-1]
-        if hasattr(UIToolsPreferences, name):
-            delattr(UIToolsPreferences, name)
+        if hasattr(PieToolsPreferences, name):
+            delattr(PieToolsPreferences, name)
             if prefs:
-                bpy.utils.unregister_class(UIToolsPreferences)
-                bpy.utils.register_class(UIToolsPreferences)
+                bpy.utils.unregister_class(PieToolsPreferences)
+                bpy.utils.register_class(PieToolsPreferences)
                 if name in prefs:
                     del prefs[name]