diff --git a/code/modules/mob/living/carbon/human/species_types/vampire.dm b/code/modules/mob/living/carbon/human/species_types/vampire.dm
index 4125d3beab..c2bafd0065 100644
--- a/code/modules/mob/living/carbon/human/species_types/vampire.dm
+++ b/code/modules/mob/living/carbon/human/species_types/vampire.dm
@@ -153,16 +153,33 @@
 		to_chat(caster, "<span class='warning'>You're already shapeshifted!</span>")
 		return
 
+	if(!ishuman(caster))
+		to_chat(caster, "<span class='warning'>You need to be humanoid to be able to do this!</span>")
+		return
+
+	var/mob/living/carbon/human/human_caster = caster
 	var/mob/living/shape = new shapeshift_type(caster.loc)
-	H = new(shape,src,caster)
+	H = new(shape,src,human_caster)
 	if(istype(H, /mob/living/simple_animal))
 		var/mob/living/simple_animal/SA = H
-		if((caster.blood_volume >= (BLOOD_VOLUME_BAD*caster.blood_ratio)) || (ventcrawl_nude_only && length(caster.get_equipped_items(include_pockets = TRUE))))
+		if((human_caster.blood_volume <= (BLOOD_VOLUME_BAD*human_caster.blood_ratio)) || (ventcrawl_nude_only && length(human_caster.get_equipped_items(include_pockets = TRUE))))
 			SA.ventcrawler = FALSE
 	if(transfer_name)
-		H.name = caster.name
+		H.name = human_caster.name
 
 
 	clothes_req = NONE
 	mobs_whitelist = null
 	mobs_blacklist = null
+
+/obj/effect/proc_holder/spell/targeted/shapeshift/bat/cast(list/targets, mob/user = usr)
+	if(!(locate(/obj/shapeshift_holder) in targets[1]))
+		if(!ishuman(user))
+			to_chat(user, "<span class='warning'>You need to be humanoid to be able to do this!</span>")
+			return
+
+		var/mob/living/carbon/human/human_user = user
+		if(!(human_user.dna?.species?.id == SPECIES_VAMPIRE))
+			to_chat(user, "<span class='warning'>You don't seem to be able to shapeshift..</span>")
+			return
+	return ..()