diff --git a/code/controllers/master.dm b/code/controllers/master.dm
index 1632b5f318f..db25833d75f 100644
--- a/code/controllers/master.dm
+++ b/code/controllers/master.dm
@@ -149,7 +149,7 @@ var/global/datum/controller/master/Master = new()
 							// If we caused BYOND to miss a tick, stop processing for a bit...
 							if(startingtick < world.time || start_time + 1 < world.timeofday)
 								break
-							sleep(-1)
+							sleep(0)
 
 				cost = MC_AVERAGE(cost, world.timeofday - start_time)
 				if(ran_subsystems)
diff --git a/code/controllers/subsystem/ticker.dm b/code/controllers/subsystem/ticker.dm
index 6951d554dec..56cdf29535f 100644
--- a/code/controllers/subsystem/ticker.dm
+++ b/code/controllers/subsystem/ticker.dm
@@ -485,5 +485,5 @@ var/datum/subsystem/ticker/ticker
 	//map rotate chance defaults to 75% of the length of the round (in minutes)
 	if (!prob((world.time/600)*config.maprotatechancedelta))
 		return
-	spawn(-1) //compiling a map can lock up the mc for 30 to 60 seconds if we don't spawn
+	spawn(0) //compiling a map can lock up the mc for 30 to 60 seconds if we don't spawn
 		maprotate()
diff --git a/code/datums/helper_datums/events.dm b/code/datums/helper_datums/events.dm
index f5e60ee7b0c..fa0dccd2a15 100644
--- a/code/datums/helper_datums/events.dm
+++ b/code/datums/helper_datums/events.dm
@@ -34,7 +34,7 @@
 	//world << "Events in [args[1]] called"
 	var/list/event = listgetindex(events,args[1])
 	if(istype(event))
-		spawn(-1)
+		spawn(0)
 			for(var/datum/event/E in event)
 				if(!E.Fire(arglist(args.Copy(2))))
 					clearEvent(args[1],E)
diff --git a/code/datums/helper_datums/teleport.dm b/code/datums/helper_datums/teleport.dm
index 6c22a9c08db..ef73781c1e6 100644
--- a/code/datums/helper_datums/teleport.dm
+++ b/code/datums/helper_datums/teleport.dm
@@ -82,12 +82,12 @@
 /datum/teleport/proc/playSpecials(atom/location,datum/effect_system/effect,sound)
 	if(location)
 		if(effect)
-			spawn(-1)
+			spawn(0)
 				src = null
 				effect.attach(location)
 				effect.start()
 		if(sound)
-			spawn(-1)
+			spawn(0)
 				src = null
 				playsound(location,sound,60,1)
 	return
diff --git a/code/game/communications.dm b/code/game/communications.dm
index d9c1595ec2e..2052b793936 100644
--- a/code/game/communications.dm
+++ b/code/game/communications.dm
@@ -40,7 +40,7 @@
 
   obj/proc/receive_signal(datum/signal/signal, var/receive_method as num, var/receive_param)
     Handler from received signals. By default does nothing. Define your own for your object.
-    Avoid of sending signals directly from this proc, use spawn(-1). Do not use sleep() here please.
+    Avoid of sending signals directly from this proc, use spawn(0). Do not use sleep() here please.
       parameters:
         signal - see description below. Extract all needed data from the signal before doing sleep(), spawn() or return!
         receive_method - may be TRANSMISSION_WIRE or TRANSMISSION_RADIO.
diff --git a/code/game/mecha/mech_fabricator.dm b/code/game/mecha/mech_fabricator.dm
index 622686e70ec..0beb82c3cdc 100644
--- a/code/game/mecha/mech_fabricator.dm
+++ b/code/game/mecha/mech_fabricator.dm
@@ -396,7 +396,7 @@
 		add_part_set_to_queue(filter.get("partset_to_queue"))
 		return update_queue_on_page()
 	if(href_list["process_queue"])
-		spawn(-1)
+		spawn(0)
 			if(processing_queue || being_built)
 				return 0
 			processing_queue = 1
diff --git a/code/modules/admin/admin_ranks.dm b/code/modules/admin/admin_ranks.dm
index 735b00c6aac..a2612b46ee2 100644
--- a/code/modules/admin/admin_ranks.dm
+++ b/code/modules/admin/admin_ranks.dm
@@ -10,7 +10,7 @@ var/list/admin_ranks = list()								//list of all admin_rank datums
 	name = init_name
 	switch(name)
 		if("Removed",null,"")
-			spawn(-1)
+			spawn(0)
 				qdel(src)
 			throw EXCEPTION("invalid admin-rank name")
 			return
diff --git a/code/modules/admin/holder2.dm b/code/modules/admin/holder2.dm
index abe7abcd91a..e7a0550b862 100644
--- a/code/modules/admin/holder2.dm
+++ b/code/modules/admin/holder2.dm
@@ -16,12 +16,12 @@ var/list/admin_datums = list()
 
 /datum/admins/New(datum/admin_rank/R, ckey)
 	if(!ckey)
-		spawn(-1)
+		spawn(0)
 			del(src)
 		throw EXCEPTION("Admin datum created without a ckey")
 		return
 	if(!istype(R))
-		spawn(-1)
+		spawn(0)
 			del(src)
 		throw EXCEPTION("Admin datum created without a rank")
 		return
diff --git a/code/modules/client/asset_cache.dm b/code/modules/client/asset_cache.dm
index 6e73a0bfd97..9928eea9eda 100644
--- a/code/modules/client/asset_cache.dm
+++ b/code/modules/client/asset_cache.dm
@@ -131,7 +131,7 @@ You can set verify to TRUE if you want send() to sleep until the client has the
 		if (register_asset)
 			register_asset(file,files[file])
 		send_asset(client,file)
-		sleep(-1) //queuing calls like this too quickly can cause issues in some client versions
+		sleep(0) //queuing calls like this too quickly can cause issues in some client versions
 
 //This proc "registers" an asset, it adds it to the cache for further use, you cannot touch it from this point on or you'll fuck things up.
 //if it's an icon or something be careful, you'll have to copy it before further use.
diff --git a/code/modules/shuttle/shuttle.dm b/code/modules/shuttle/shuttle.dm
index e3185534e1c..9ff02f88090 100644
--- a/code/modules/shuttle/shuttle.dm
+++ b/code/modules/shuttle/shuttle.dm
@@ -374,7 +374,7 @@
 					//close open doors
 					if(istype(O, /obj/machinery/door))
 						var/obj/machinery/door/Door = O
-						spawn(-1)
+						spawn(0)
 							if(Door)
 								Door.close()
 				else if (istype(AM,/mob))
@@ -443,7 +443,7 @@
 	if(T)
 		var/obj/machinery/door/Door = locate() in T
 		if(Door)
-			spawn(-1)
+			spawn(0)
 				Door.close()
 
 /obj/docking_port/mobile/proc/roadkill(list/L, dir, x, y)