diff --git a/src/api/TryCze.gf b/src/api/TryCze.gf
index ef63511a..3f0e6bd3 100644
--- a/src/api/TryCze.gf
+++ b/src/api/TryCze.gf
@@ -1,12 +1,18 @@
 --# -path=.:../czech:../common:../abstract:../prelude
 
-resource TryCze = ExtraCze, SyntaxCze, LexiconCze, ParadigmsCze -[mkAdv,mkAdN,mkIAdv,mkDet,mkIDet,mkIP,mkQuant,mkCard,mkPConj,mkVoc]**
-  open (P = ParadigmsCze) in {
+resource TryCze = ExtraCze, SyntaxCze-[mkVoc], LexiconCze, ParadigmsCze -[mkAdv,mkAdN,mkIAdv,mkDet,mkIDet,mkIP,mkQuant,mkCard,mkPConj,mkVoc]**
+  open (P = ParadigmsCze),(S = SyntaxCze) in {
 
--- oper
-
---  mkAdv = overload SyntaxCze {
---    mkAdv : Str -> Adv = P.mkAdv ;
---  } ;
+oper
+  mkAdv = overload SyntaxCze {
+    mkAdv : Str -> Adv = P.mkAdv ;
+  } ;
+  mkVoc = overload {
+    mkVoc : NP -> Voc = S.mkVoc ;
+    mkVoc : Str -> Voc = P.mkVoc ;
+  } ;
+  mkIP = overload SyntaxCze {
+    mkIP : Str -> IP = P.mkIP ;
+  } ;
 
 }
diff --git a/src/czech/ParadigmsCze.gf b/src/czech/ParadigmsCze.gf
index f6b66f57..f5e40251 100644
--- a/src/czech/ParadigmsCze.gf
+++ b/src/czech/ParadigmsCze.gf
@@ -285,7 +285,7 @@ oper
     c = {s = [] ; c = Acc ; hasPrep = False}}) ;
   mkV2V : Str -> V2V = \s -> lin V2V ((mkVerb s) ** {
     c = {s = [] ; c = Acc ; hasPrep = False}}) ;
-  mkVoc : Str -> {s : Str} = \s -> {s = s} ;
+  mkVoc : Str -> CatCze.Voc = \s -> lin Voc {s = s} ;
 
 
 }
diff --git a/tests/czech/regressions.gfs b/tests/czech/regressions.gfs
index 65e672d7..ea385434 100644
--- a/tests/czech/regressions.gfs
+++ b/tests/czech/regressions.gfs
@@ -19,7 +19,7 @@ cc -one ((zenaN "Zoja").sgen ++ (zenaN "Zoja").sdat)
 cc -one (L.school_N.sdat ++ (zenaN "váza").sdat ++ (zenaN "mísa").sdat ++ (zenaN "banka").sdat)
 cc -one (L.salt_N.snom ++ L.salt_N.sacc ++ L.salt_N.svoc)
 cc -one (SyntaxCze.mkAdv in_Prep (mkNP plNum L.milk_N))
-cc -one (SyntaxCze.mkVoc (mkNP L.year_N))
+cc -one (mkVoc (mkNP L.year_N))
 cc -one (SyntaxCze.mkAdv in_Prep (mkNP plNum L.apple_N))
 
 -- Náš/váš inflect for the possessed noun, independently of addressee number.
@@ -245,8 +245,8 @@ cc -one (SyntaxCze.mkAdv with_Prep (mkNP (mkCN (mkAP L.young_A (mkNP he_Pron)) (
 -- A ProDrop comparison pronoun must still be overt.
 cc -one (mkUtt (mkS (mkCl (mkNP (E.ProDrop i_Pron)) (mkAP L.young_A (mkNP (E.ProDrop she_Pron))))))
 -- Addressing a quantified group retains genitive government.
-cc -one (SyntaxCze.mkVoc (mkNP (mkCard "5") L.child_N))
-cc -one (SyntaxCze.mkVoc (mkNP all_Predet (mkNP (mkCard "5") L.child_N)))
+cc -one (mkVoc (mkNP (mkCard "5") L.child_N))
+cc -one (mkVoc (mkNP all_Predet (mkNP (mkCard "5") L.child_N)))
 -- Pronominal heads retain their order after modification and binding.
 cc -one (SyntaxCze.mkAdv with_Prep (mkNP all_Predet (mkNP youPl_Pron)))
 -- The outer pronoun controls all, independently of the reflexive's antecedent.