diff --git a/code/game/objects/items/stacks/stack.dm b/code/game/objects/items/stacks/stack.dm
index 9a73ed0eec..83ce6d3f49 100644
--- a/code/game/objects/items/stacks/stack.dm
+++ b/code/game/objects/items/stacks/stack.dm
@@ -17,6 +17,7 @@
 	var/amount = 1
 	var/max_amount //also see stack recipes initialisation, param "max_res_amount" must be equal to this max_amount
 	var/stacktype //determines whether different stack types can merge
+	var/build_type = null //used when directly applied to a turf
 	var/uses_charge = 0
 	var/list/charge_costs = null
 	var/list/datum/matter_synth/synths = null
diff --git a/code/game/objects/items/stacks/tiles/tile_types.dm b/code/game/objects/items/stacks/tiles/tile_types.dm
index f86ecbade9..4f4b53c7c0 100644
--- a/code/game/objects/items/stacks/tiles/tile_types.dm
+++ b/code/game/objects/items/stacks/tiles/tile_types.dm
@@ -12,7 +12,6 @@
 	desc = "A non-descript floor tile"
 	w_class = 3
 	max_amount = 60
-	var/build_type = null
 
 /obj/item/stack/tile/New()
 	..()
diff --git a/code/game/turfs/simulated/floor_attackby.dm b/code/game/turfs/simulated/floor_attackby.dm
index 13e36882a3..c8cc2660c9 100644
--- a/code/game/turfs/simulated/floor_attackby.dm
+++ b/code/game/turfs/simulated/floor_attackby.dm
@@ -57,7 +57,7 @@
 				var/decl/flooring/F = flooring_types[flooring_type]
 				if(!F.build_type)
 					continue
-				if(C.type == F.build_type)
+				if((S.type == F.build_type) || (S.build_type == F.build_type))
 					use_flooring = F
 					break
 			if(!use_flooring)