diff --git a/code/game/objects/structures/holosigns.dm b/code/game/objects/structures/holosigns.dm
index fa923e2898a..d94ab469ada 100644
--- a/code/game/objects/structures/holosigns.dm
+++ b/code/game/objects/structures/holosigns.dm
@@ -62,9 +62,9 @@
 		return TRUE
 	if(mover.pass_flags & (PASSGLASS|PASSTABLE|PASSGRILLE))
 		return TRUE
-	if(iscarbon(mover))
-		var/mob/living/carbon/C = mover
-		if(allow_walk && (C.m_intent == MOVE_INTENT_WALK || (C.pulledby && C.pulledby.m_intent == MOVE_INTENT_WALK)))
+	if(isliving(mover))
+		var/mob/living/walker = mover
+		if(allow_walk && (walker.m_intent == MOVE_INTENT_WALK || (walker.pulledby && walker.pulledby.m_intent == MOVE_INTENT_WALK)))
 			return TRUE
 
 /obj/structure/holosign/barrier/engineering