diff --git a/release/scripts/startup/bl_ui/space_userpref.py b/release/scripts/startup/bl_ui/space_userpref.py
index bf396e98c79..cad5369f440 100644
--- a/release/scripts/startup/bl_ui/space_userpref.py
+++ b/release/scripts/startup/bl_ui/space_userpref.py
@@ -752,7 +752,7 @@ class USERPREF_PT_file(bpy.types.Panel):
 from bl_ui.space_userpref_keymap import InputKeyMapPanel
 
 
-class USERPREF_PT_input(InputKeyMapPanel):
+class USERPREF_PT_input(bpy.types.Panel, InputKeyMapPanel):
     bl_space_type = 'USER_PREFERENCES'
     bl_label = "Input"
 
diff --git a/release/scripts/startup/bl_ui/space_userpref_keymap.py b/release/scripts/startup/bl_ui/space_userpref_keymap.py
index 378fe231091..982e19e6234 100644
--- a/release/scripts/startup/bl_ui/space_userpref_keymap.py
+++ b/release/scripts/startup/bl_ui/space_userpref_keymap.py
@@ -138,7 +138,7 @@ class USERPREF_MT_keyconfigs(bpy.types.Menu):
         bpy.types.Menu.draw_preset(self, context)
 
 
-class InputKeyMapPanel(bpy.types.Panel):
+class InputKeyMapPanel:
     bl_space_type = 'USER_PREFERENCES'
     bl_label = "Input"
     bl_region_type = 'WINDOW'