diff --git a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents.dm b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents.dm
index dc5d19df310..beb30dfabe6 100644
--- a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents.dm
+++ b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents.dm
@@ -651,8 +651,9 @@ datum/reagent/space_cleaner/reaction_turf(var/turf/T, var/volume)
 		for(var/mob/living/carbon/slime/M in T)
 			M.adjustToxLoss(rand(5,10))
 	var/turf/simulated/floor/F = T
-	if(volume >= 1)
-		F.dirt = 0
+	if(istype(T, /turf/simulated/floor))
+		if(volume >= 1)
+			F.dirt = 0
 
 datum/reagent/space_cleaner/reaction_mob(var/mob/M, var/method=TOUCH, var/volume)
 	if(iscarbon(M))