one

code/game/objects/items/devices/geiger_counter.dm

@@ -192,13 +192,15 @@
 	update_icon()
 
 /obj/item/geiger_counter/emag_act(mob/user)
+	. = ..()
 	if(obj_flags & EMAGGED)
 		return
 	if(scanning)
 		to_chat(user, "<span class='warning'>Turn off [src] before you perform this action!</span>")
-		return 0
+		return
 	to_chat(user, "<span class='warning'>You override [src]'s radiation storing protocols. It will now generate small doses of radiation, and stored rads are now projected into creatures you scan.</span>")
 	obj_flags |= EMAGGED
+	return TRUE
 
 /obj/item/geiger_counter/cyborg
 	var/datum/component/mobhook