diff --git a/src/finnish/MakeStructuralFin.gf b/src/finnish/MakeStructuralFin.gf
index d42d9ead0..8261c51e6 100644
--- a/src/finnish/MakeStructuralFin.gf
+++ b/src/finnish/MakeStructuralFin.gf
@@ -10,7 +10,12 @@ oper
   mkIQuant : Str -> IQuant = \s ->
     {s = \\n,c => s ; lock_IQuant = <>} ; ----
 
+  mkIDet : Bool -> Str -> N -> Number -> IDet = \isNum,pref,s,n ->
+    lin IDet {s = \\c => pref ++ s.s ! NCase n c ; n = n ; isNum = isNum} ;
+
   mkDet : N -> Number -> Det = \s,n ->
-    MorphoFin.mkDet n s ;
-    
+    lin Det (MorphoFin.mkDet n s) ;
+  partDet : N -> Number -> Det = \s,n ->
+    lin Det (MorphoFin.partDet False n s) ;
+
 }
diff --git a/src/finnish/MorphoFin.gf b/src/finnish/MorphoFin.gf
index b92f32f32..a85b40a04 100644
--- a/src/finnish/MorphoFin.gf
+++ b/src/finnish/MorphoFin.gf
@@ -933,6 +933,10 @@ caseTable : Number -> CommonNoun -> Case => Str = \n,cn ->
     isNeg = pol
     } ;
 
+  partDet : Bool -> Number -> CommonNoun -> (PDet ** {sp : Case => Str}) = \isNeg,num,cn ->
+    mkDetPol isNeg num cn ** {isNum = True} ;
+
+
 -- Here we define personal and relative pronouns.
 -- Personal pronouns have possessive suffix (hänen talonsa) but "se" doesn't (sen talo)