diff --git a/src/backends/meta-input-settings-dummy.c b/src/backends/meta-input-settings-dummy.c
index 74e6f429c..4da354668 100644
--- a/src/backends/meta-input-settings-dummy.c
+++ b/src/backends/meta-input-settings-dummy.c
@@ -221,12 +221,6 @@ meta_input_settings_dummy_has_two_finger_scroll (MetaInputSettings  *settings,
 {
   return FALSE;
 }
-static gboolean
-meta_input_settings_dummy_is_trackball_device (MetaInputSettings  *settings,
-                                               ClutterInputDevice *device)
-{
-  return FALSE;
-}
 
 static void
 meta_input_settings_dummy_init (MetaInputSettingsDummy *input_settings)
@@ -290,6 +284,4 @@ meta_input_settings_dummy_class_init (MetaInputSettingsDummyClass *klass)
     meta_input_settings_dummy_set_trackball_middle_click_emulation;
   input_settings_class->has_two_finger_scroll =
     meta_input_settings_dummy_has_two_finger_scroll;
-  input_settings_class->is_trackball_device =
-    meta_input_settings_dummy_is_trackball_device;
 }
diff --git a/src/backends/meta-input-settings-private.h b/src/backends/meta-input-settings-private.h
index 5ef54ee84..fa5138e9d 100644
--- a/src/backends/meta-input-settings-private.h
+++ b/src/backends/meta-input-settings-private.h
@@ -152,8 +152,6 @@ struct _MetaInputSettingsClass
 
   gboolean (* has_two_finger_scroll) (MetaInputSettings  *settings,
                                       ClutterInputDevice *device);
-  gboolean (* is_trackball_device) (MetaInputSettings  *settings,
-                                    ClutterInputDevice *device);
 };
 
 void meta_input_settings_maybe_save_numlock_state (MetaInputSettings *input_settings,