diff --git a/code/__HELPERS/_lists.dm b/code/__HELPERS/_lists.dm
index 33b445c5ac9..e66d528a5af 100644
--- a/code/__HELPERS/_lists.dm
+++ b/code/__HELPERS/_lists.dm
@@ -228,16 +228,6 @@
 		i--
 	return L[i]
 
-/*
- * Sorting
- */
-//Reverses the order of items in the list
-/proc/reverselist(list/input)
-	var/list/output = list()
-	for(var/i = input.len; i >= 1; i--)
-		output += input[i]
-	return output
-
 //Randomize: Return the list in a random order
 /proc/shuffle(list/L)
 	if(!L)
diff --git a/code/controllers/master.dm b/code/controllers/master.dm
index 97410d7d8c2..ab4ff43b047 100644
--- a/code/controllers/master.dm
+++ b/code/controllers/master.dm
@@ -81,7 +81,7 @@ GLOBAL_VAR_INIT(CURRENT_TICKLIMIT, TICK_LIMIT_RUNNING)
 /datum/controller/master/Shutdown()
 	processing = FALSE
 	sortTim(subsystems, /proc/cmp_subsystem_init)
-	subsystems = reverselist(subsystems)
+	reverseRange(subsystems)
 	for(var/datum/controller/subsystem/ss in subsystems)
 		ss.Shutdown()