diff --git a/code/modules/lighting/lighting_corner.dm b/code/modules/lighting/lighting_corner.dm
index c51e7feb7a..7288d47280 100644
--- a/code/modules/lighting/lighting_corner.dm
+++ b/code/modules/lighting/lighting_corner.dm
@@ -90,6 +90,9 @@ GLOBAL_LIST_INIT(LIGHTING_CORNER_DIAGONAL, list(NORTHEAST, SOUTHEAST, SOUTHWEST,
 	lum_g += delta_g
 	lum_b += delta_b
 
+	if ((delta_r+delta_g+delta_b) == 0)
+		return
+
 	if (!needs_update)
 		needs_update = TRUE
 		GLOB.lighting_update_corners += src