--- a/src/xfpm-backlight.c
+++ b/src/xfpm-backlight.c
@@ -88,7 +88,7 @@ xfpm_backlight_dim_brightness (XfpmBackl
     
     if (xfpm_power_get_mode (backlight->priv->power) == XFPM_POWER_MODE_NORMAL )
     {
-	glong dim_level;
+	glong dim_level = 0;
 	
 	g_object_get (G_OBJECT (backlight->priv->conf),
 		      backlight->priv->on_battery ? BRIGHTNESS_LEVEL_ON_BATTERY : BRIGHTNESS_LEVEL_ON_AC, &dim_level,