diff --git a/code/modules/admin/view_variables/mark_datum.dm b/code/modules/admin/view_variables/mark_datum.dm
index 9f1b333750..b608c57aba 100644
--- a/code/modules/admin/view_variables/mark_datum.dm
+++ b/code/modules/admin/view_variables/mark_datum.dm
@@ -6,7 +6,7 @@
 	holder.marked_datum = D
 	vv_update_display(D, "marked", VV_MSG_MARKED)
 
-/client/proc/mark_datum_mapview(datum/D as mob|obj|turf|area in view(view))
+/client/proc/mark_datum_mapview(datum/D in world)
 	set category = "Debug"
 	set name = "Mark Object"
 	mark_datum(D)