diff --git a/code/ATMOSPHERICS/components/unary/cold_sink.dm b/code/ATMOSPHERICS/components/unary/cold_sink.dm
index faefa64883..d0280d3044 100644
--- a/code/ATMOSPHERICS/components/unary/cold_sink.dm
+++ b/code/ATMOSPHERICS/components/unary/cold_sink.dm
@@ -162,7 +162,7 @@
 		if(istype(P, /obj/item/weapon/stock_parts/matter_bin))
 			bin_rating += P.rating
 
-	power_rating = initial(power_rating) * cap_rating / 2			//more powerful
+	max_power_rating = initial(max_power_rating) * cap_rating / 2			//more powerful
 	heatsink_temperature = initial(heatsink_temperature) / ((manip_rating + bin_rating) / 2)	//more efficient
 	air_contents.volume = max(initial(internal_volume) - 200, 0) + 200 * bin_rating
 	set_power_level(power_setting)