diff --git a/code/game/machinery/vending/cm_vending.dm b/code/game/machinery/vending/cm_vending.dm
index d4dfb9b823..18b62b9d77 100644
--- a/code/game/machinery/vending/cm_vending.dm
+++ b/code/game/machinery/vending/cm_vending.dm
@@ -763,10 +763,9 @@ GLOBAL_LIST_EMPTY(vending_products)
 
 /obj/structure/machinery/cm_vending/gear/Initialize()
 	. = ..()
-	if(length(list(z) & SSmapping.levels_by_trait(ZTRAIT_GROUND)))
+	if(z in SSmapping.levels_by_trait(ZTRAIT_GROUND))
 		malfunction()
 
-
 /obj/structure/machinery/cm_vending/gear/ui_static_data(mob/user)
 	. = ..(user)
 	.["vendor_type"] = "gear"
@@ -786,7 +785,7 @@ GLOBAL_LIST_EMPTY(vending_products)
 
 /obj/structure/machinery/cm_vending/clothing/Initialize()
 	. = ..()
-	if(length(list(z) & SSmapping.levels_by_trait(ZTRAIT_GROUND)))
+	if(z in SSmapping.levels_by_trait(ZTRAIT_GROUND))
 		malfunction()
 
 /obj/structure/machinery/cm_vending/clothing/ui_static_data(mob/user)
diff --git a/code/game/machinery/vending/vendor_types/requisitions.dm b/code/game/machinery/vending/vendor_types/requisitions.dm
index b824e2bb6e..a0be9e2793 100644
--- a/code/game/machinery/vending/vendor_types/requisitions.dm
+++ b/code/game/machinery/vending/vendor_types/requisitions.dm
@@ -12,7 +12,7 @@
 
 /obj/structure/machinery/cm_vending/sorted/cargo_guns/Initialize()
 	. = ..()
-	if(length(list(z) & SSmapping.levels_by_trait(ZTRAIT_GROUND)))
+	if(z in SSmapping.levels_by_trait(ZTRAIT_GROUND))
 		malfunction()
 
 /obj/structure/machinery/cm_vending/sorted/cargo_guns/vend_fail()
@@ -216,7 +216,7 @@
 
 /obj/structure/machinery/cm_vending/sorted/cargo_ammo/Initialize()
 	. = ..()
-	if(length(list(z) & SSmapping.levels_by_trait(ZTRAIT_GROUND)))
+	if(z in SSmapping.levels_by_trait(ZTRAIT_GROUND))
 		malfunction()
 
 /obj/structure/machinery/cm_vending/sorted/cargo_ammo/vend_fail()
@@ -343,7 +343,7 @@
 
 /obj/structure/machinery/cm_vending/sorted/attachments/Initialize()
 	. = ..()
-	if(length(list(z) & SSmapping.levels_by_trait(ZTRAIT_GROUND)))
+	if(z in SSmapping.levels_by_trait(ZTRAIT_GROUND))
 		malfunction()
 
 /obj/structure/machinery/cm_vending/sorted/attachments/vend_fail()