diff --git a/lib/src/finnish/ConstructionFin.gf b/lib/src/finnish/ConstructionFin.gf
index b196ed74d..cab5761c6 100644
--- a/lib/src/finnish/ConstructionFin.gf
+++ b/lib/src/finnish/ConstructionFin.gf
@@ -70,7 +70,7 @@ lincat Language = PN ;
 lin InLanguage l = SyntaxFin.mkAdv (mkPrep translative) (mkNP l) ;
 
 lin
-  weekdayN w = w ;
+  weekdayN w = w.noun ;
   monthN m = m ;
   languagePN l = l ;