diff --git a/apps/settings.h b/apps/settings.h
index e422bb2b63..c4db9a18b4 100644
--- a/apps/settings.h
+++ b/apps/settings.h
@@ -394,7 +394,9 @@ struct user_settings
     int backlight_timeout;  /* backlight off timeout:  0-18 0=never,
                                1=always,
                                then according to timeout_values[] */
+#if CONFIG_CHARGING
     int backlight_timeout_plugged;
+#endif
 
 #ifdef HAVE_BACKLIGHT_PWM_FADING
     int backlight_fade_in;  /* backlight fade in timing: 0..3 */