diff --git a/code/datums/datum.dm b/code/datums/datum.dm
index cdb195dd821..8737cd8feb9 100644
--- a/code/datums/datum.dm
+++ b/code/datums/datum.dm
@@ -4,7 +4,7 @@
 	var/list/datum_components //for /datum/components
 	var/list/status_traits
 	var/list/comp_lookup //it used to be for looking up components which had registered a signal but now anything can register
-	var/list/signal_procs
+	var/list/list/datum/callback/signal_procs
 	var/signal_enabled = FALSE
 	var/datum_flags = NONE
 	var/datum/weakref/weak_reference
diff --git a/code/game/objects/items/grenades/chem_grenade.dm b/code/game/objects/items/grenades/chem_grenade.dm
index 4461d5c5ad3..8e744cfb93f 100644
--- a/code/game/objects/items/grenades/chem_grenade.dm
+++ b/code/game/objects/items/grenades/chem_grenade.dm
@@ -10,7 +10,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	force = 2
 	var/stage = EMPTY
-	var/list/beakers = list()
+	var/list/obj/item/reagent_containers/glass/beakers = list()
 	var/list/allowed_containers = list(/obj/item/reagent_containers/glass/beaker, /obj/item/reagent_containers/glass/bottle)
 	var/list/banned_containers = list(/obj/item/reagent_containers/glass/beaker/bluespace) //Containers to exclude from specific grenade subtypes
 	var/affected_area = 3
diff --git a/code/modules/cargo/centcom_podlauncher.dm b/code/modules/cargo/centcom_podlauncher.dm
index 8ca4c2e2607..8cb86c6bf00 100644
--- a/code/modules/cargo/centcom_podlauncher.dm
+++ b/code/modules/cargo/centcom_podlauncher.dm
@@ -34,7 +34,7 @@
 	var/launchCounter = 1 //Used with the "Ordered" launch mode (launchChoice = 1) to see what item is launched
 	var/atom/specificTarget //Do we want to target a specific mob instead of where we click? Also used for smiting
 	var/list/orderedArea = list() //Contains an ordered list of turfs in an area (filled in the createOrderedArea() proc), read top-left to bottom-right. Used for the "ordered" launch mode (launchChoice = 1)
-	var/list/acceptableTurfs = list() //Contians a list of turfs (in the "bay" area on centcom) that have items that can be launched. Taken from orderedArea
+	var/list/turf/acceptableTurfs = list() //Contians a list of turfs (in the "bay" area on centcom) that have items that can be launched. Taken from orderedArea
 	var/list/launchList = list() //Contains whatever is going to be put in the supplypod and fired. Taken from acceptableTurfs
 	var/obj/effect/supplypod_selector/selector = new() //An effect used for keeping track of what item is going to be launched when in "ordered" mode (launchChoice = 1)
 	var/obj/structure/closet/supplypod/centcompod/temp_pod //The temporary pod that is modified by this datum, then cloned. The buildObject() clone of this pod is what is launched
diff --git a/code/modules/mining/machine_silo.dm b/code/modules/mining/machine_silo.dm
index bd1da0a90f7..465e384f297 100644
--- a/code/modules/mining/machine_silo.dm
+++ b/code/modules/mining/machine_silo.dm
@@ -171,7 +171,7 @@ GLOBAL_LIST_EMPTY(silo_access_logs)
 		return
 	var/datum/ore_silo_log/entry = new(M, action, amount, noun, mats)
 
-	var/list/logs = GLOB.silo_access_logs[REF(src)]
+	var/list/datum/ore_silo_log/logs = GLOB.silo_access_logs[REF(src)]
 	if(!LAZYLEN(logs))
 		GLOB.silo_access_logs[REF(src)] = logs = list(entry)
 	else if(!logs[1].merge(entry))