diff --git a/code/_onclick/hud/guardian_hud.dm b/code/_onclick/hud/guardian_hud.dm
index 87764ef344a..d00662f0c76 100644
--- a/code/_onclick/hud/guardian_hud.dm
+++ b/code/_onclick/hud/guardian_hud.dm
@@ -53,6 +53,9 @@
 		if(istype(summoner_loc, /obj/machinery/atmospherics))
 			to_chat(G, "<span class='warning'>You can not manifest while in these pipes!</span>")
 			return
+		if(istype(summoner_loc, /obj/structure/closet/cardboard/agent))
+			to_chat(G, "<span class='warning'>You can not manifest while inside an active Stealth Implant!</span>")
+			return
 		if(G.loc == G.summoner)
 			G.Manifest()