diff --git a/code/modules/research/nanites/nanite_programs/utility.dm b/code/modules/research/nanites/nanite_programs/utility.dm
index 44b85e4210..a269d01ac0 100644
--- a/code/modules/research/nanites/nanite_programs/utility.dm
+++ b/code/modules/research/nanites/nanite_programs/utility.dm
@@ -236,10 +236,14 @@
 /datum/nanite_program/spreading/active_effect()
 	if(prob(10))
 		var/list/mob/living/target_hosts = list()
-		for(var/mob/living/L in oview(5, host_mob))
+		var/turf/T = get_turf(host_mob)
+		for(var/mob/living/L in range(5, host_mob))
 			if(!(MOB_ORGANIC in L.mob_biotypes) && !(MOB_UNDEAD in L.mob_biotypes))
 				continue
+			if(!disease_air_spread_walk(T, get_turf(L)))
+				continue
 			target_hosts += L
+		target_hosts -= host_mob
 		if(!target_hosts.len)
 			return
 		var/mob/living/infectee = pick(target_hosts)