diff --git a/src/gpm-backlight.c b/src/gpm-backlight.c
index fd69465d..cf9b06b7 100644
--- a/src/gpm-backlight.c
+++ b/src/gpm-backlight.c
@@ -254,19 +254,6 @@ gpm_backlight_dialog_show (GpmBacklight *backlight)
 	gdk_display_sync (gtk_widget_get_display (backlight->priv->popup));
 }
 
-/**
- * gpm_common_sum_scale:
- *
- * Finds the average between value1 and value2 set on a scale factor
- **/
-static inline gfloat
-gpm_common_sum_scale (gfloat value1, gfloat value2, gfloat factor)
-{
-	gfloat diff;
-	diff = value1 - value2;
-	return value2 + (diff * factor);
-}
-
 /**
  * gpm_backlight_brightness_evaluate_and_set:
  **/