diff --git a/code/datums/spells/horsemask.dm b/code/datums/spells/horsemask.dm
index 9b0890515f5..28a77291993 100644
--- a/code/datums/spells/horsemask.dm
+++ b/code/datums/spells/horsemask.dm
@@ -27,7 +27,7 @@
 		return
 
 
-	if(!is_type_in_list(target, compatible_mobs))
+	if(!ishuman(target))
 		to_chat(user, "<span class='notice'>It'd be stupid to curse [target] with a horse's head!</span>")
 		return