diff --git a/meta/features.ptl b/meta/features.ptl
index 33a5d10..f3cff95 100644
--- a/meta/features.ptl
+++ b/meta/features.ptl
@@ -63,11 +63,9 @@ export : define [apply para glyphList] : begin
 					if r : set subtable.bases.(glyph.name) r
 		lookup.subtables.push subtable
 	
-	createMTSSubtable lookup_mark {'above' 'below' 'overlay' 'slash'}
-	createMTSSubtable lookup_mark {'trailing' 'lf' 'topright' 'bottomright'}
-	createMTSSubtable lookup_mkmk {'above'}
-	createMTSSubtable lookup_mkmk {'below'}
-	createMTSSubtable lookup_mkmk {'trailing' 'lf' 'topright' 'bottomright' 'overlay' 'slash'}
+	foreach [marktag : items-of {'above' 'below' 'overlay' 'slash' 'topright' 'bottomright' 'trailing' 'lf'}] : begin
+		createMTSSubtable lookup_mark {marktag}
+		createMTSSubtable lookup_mkmk {marktag}
 
 	# GDEF
 	local GDEF {.glyphClassDef {.}}