diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
index 4503dc9003b26f9ed26f55cbfd1d8cf74986d16c..a379910101301da366a5e0807b19ea480093f714 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
@@ -76,7 +76,7 @@ void main()
 		
 		float fd = far_focal_distance;
 		float sc = far_focal_distance - depth[0];
-		sc /= near_focal_distance-far_focal_distance;
+		sc /= -far_focal_distance;
 		
 		sc = min(sc, 8.0);