diff --git a/code/__DEFINES/interaction_flags.dm b/code/__DEFINES/interaction_flags.dm
index dc3242c910..6f35ee8e1f 100644
--- a/code/__DEFINES/interaction_flags.dm
+++ b/code/__DEFINES/interaction_flags.dm
@@ -20,3 +20,5 @@
 #define INTERACT_MACHINE_SET_MACHINE 		(1<<6)		//MACHINES HAVE THIS BY DEFAULT, SOMEONE SHOULD RUN THROUGH MACHINES AND REMOVE IT FROM THINGS LIKE LIGHT SWITCHES WHEN POSSIBLE!!--------------------------
 												//This flag determines if a machine set_machine's the user when the user uses it, making updateUsrDialog make the user re-call interact() on it.
 												//THIS FLAG IS ON ALL MACHINES BY DEFAULT, NEEDS TO BE RE-EVALUATED LATER!!
+
+#define INTERACT_GHOST_READ	(1<<0)