diff --git a/code/game/objects/random/mob.dm b/code/game/objects/random/mob.dm
index 5149dd3cc2f..887b0d19057 100644
--- a/code/game/objects/random/mob.dm
+++ b/code/game/objects/random/mob.dm
@@ -41,7 +41,8 @@
 	var/build_path = item_to_spawn()
 
 	var/mob/living/simple_mob/M = new build_path(src.loc)
-	ASSERT(istype(M))
+	if(!istype(M))
+		return
 	if(M.has_AI())
 		var/datum/ai_holder/AI = M.ai_holder
 		AI.go_sleep() //Don't fight eachother while we're still setting up!