diff --git a/code/controllers/subsystems/persistence.dm b/code/controllers/subsystems/persistence.dm
index c2724c2d60..00c08363de 100644
--- a/code/controllers/subsystems/persistence.dm
+++ b/code/controllers/subsystems/persistence.dm
@@ -31,7 +31,7 @@ SUBSYSTEM_DEF(persistence)
 		return
 
 //	if((!T.z in GLOB.using_map.station_levels) || !initialized)
-	if(!T.z in using_map.station_levels)
+	if(!(T.z in using_map.station_levels))
 		return
 
 	if(!tracking_values[track_type])