diff --git a/code/controllers/subsystem/SSthrowing.dm b/code/controllers/subsystem/SSthrowing.dm
index db2755fd734..bb0e1b5b224 100644
--- a/code/controllers/subsystem/SSthrowing.dm
+++ b/code/controllers/subsystem/SSthrowing.dm
@@ -73,7 +73,7 @@ SUBSYSTEM_DEF(throwing)
 	/// Can a thrown mob move themselves to stop the throw?
 	var/should_block_movement = TRUE
 	/// This is internal variable to support no gravity movement even if var/should_block_movement is TRUE. This variable will change during throwing
-	var/block_movement = TRUE
+	VAR_PRIVATE/block_movement = TRUE
 
 /datum/thrownthing/proc/tick()
 	var/atom/movable/AM = thrownthing