diff --git a/code/controllers/Processes/air.dm b/code/controllers/Processes/air.dm
index 36ce3b49fd9..311699bb720 100644
--- a/code/controllers/Processes/air.dm
+++ b/code/controllers/Processes/air.dm
@@ -149,5 +149,3 @@ DECLARE_GLOBAL_CONTROLLER(air_system, air_master)
 	icemaster.icon_state = "snowfloor"
 	icemaster.layer = TURF_LAYER+0.1
 	icemaster.mouse_opacity = 0
-
-DECLARE_GLOBAL_CONTROLLER(air_system, air_master)
diff --git a/code/controllers/Processes/mob.dm b/code/controllers/Processes/mob.dm
index 5c944bb101b..86c76604606 100644
--- a/code/controllers/Processes/mob.dm
+++ b/code/controllers/Processes/mob.dm
@@ -8,7 +8,6 @@ var/global/datum/controller/process/mob/mob_master
 	schedule_interval = 20 // every 2 seconds
 	start_delay = 16
 	log_startup_progress("Mob ticker starting up.")
-	mob_master = src
 
 /datum/controller/process/mob/started()
 	..()
diff --git a/code/controllers/Processes/shuttles.dm b/code/controllers/Processes/shuttles.dm
index 84d7c279d11..21f2e8c390e 100644
--- a/code/controllers/Processes/shuttles.dm
+++ b/code/controllers/Processes/shuttles.dm
@@ -40,8 +40,6 @@ var/const/CALL_SHUTTLE_REASON_LENGTH = 12
 	name = "shuttle"
 	schedule_interval = 20
 
-	shuttle_master = src
-
 	var/watch = start_watch()
 	log_startup_progress("Initializing shuttle docks...")
 	initialize_docks()