diff --git a/code/modules/modular_computers/file_system/programs/sm_monitor.dm b/code/modules/modular_computers/file_system/programs/sm_monitor.dm
index 4a0532104a..8e86acb965 100644
--- a/code/modules/modular_computers/file_system/programs/sm_monitor.dm
+++ b/code/modules/modular_computers/file_system/programs/sm_monitor.dm
@@ -44,7 +44,7 @@
 	//var/valid_z_levels = (GetConnectedZlevels(T.z) & using_map.station_levels)
 	for(var/obj/machinery/power/supermatter_shard/S in GLOB.machines)
 		// Delaminating, not within coverage, not on a tile.
-		if(!((S.z in GLOB.station_z_levels) || S.z == ZLEVEL_MINING || S.z == T.z) || !istype(S.loc, /turf/))
+		if(!((S.z in GLOB.station_z_levels) || S.z == ZLEVEL_MINING || S.z == T.z || !isturf(S.loc)))
 			continue
 		supermatters.Add(S)