diff --git a/src/GF/Compile/GeneratePMCFG.hs b/src/GF/Compile/GeneratePMCFG.hs
index 619e5088b..a20496d70 100644
--- a/src/GF/Compile/GeneratePMCFG.hs
+++ b/src/GF/Compile/GeneratePMCFG.hs
@@ -217,16 +217,10 @@ emptyGrammarEnv cnc_defs lincats =
   let (last_id,catSet) = Map.mapAccumWithKey computeCatRange 0 lincats
   in GrammarEnv last_id (IntMap.singleton 0 catSet) Map.empty Map.empty Map.empty IntMap.empty
   where
-    cidString = mkCId "String"
-    cidInt    = mkCId "Int"
-    cidFloat  = mkCId "Float"
-    cidVar    = mkCId "_Var"
-    
     computeCatRange index cat ctype
       | cat == cidString = (index,     (fcatString,fcatString,[]))
       | cat == cidInt    = (index,     (fcatInt,   fcatInt,   []))
       | cat == cidFloat  = (index,     (fcatFloat, fcatFloat, []))
-      | cat == cidVar    = (index,     (fcatVar,   fcatVar,   []))
       | otherwise        = (index+size,(index,index+size-1,poly))
       where
         (size,poly) = getMultipliers 1 [] ctype
diff --git a/src/PGF/Generate.hs b/src/PGF/Generate.hs
index 64ca4d5f5..518c2c71b 100644
--- a/src/PGF/Generate.hs
+++ b/src/PGF/Generate.hs
@@ -36,8 +36,9 @@ genRandom gen pgf cat = genTrees (randomRs (0.0, 1.0 :: Double) gen) cat where
                 (genTrees ds2 cat)          -- else (drop k ds)
 
   genTree rs = gett rs where
-    gett ds cid | cid == mkCId "String" = (Lit (LStr "foo"), 1)
-    gett ds cid | cid == mkCId "Int"    = (Lit (LInt 12345), 1)
+    gett ds cid | cid == cidString = (Lit (LStr "foo"), 1)
+    gett ds cid | cid == cidInt    = (Lit (LInt 12345), 1)
+    gett ds cid | cid == cidFloat  = (Lit (LFlt 12345), 1)
     gett [] _   = (Lit (LStr "TIMEOUT"), 1) ----
     gett ds cat = case fns cat of
       [] -> (Meta 0,1)
diff --git a/src/PGF/Macros.hs b/src/PGF/Macros.hs
index 9b768cd5f..b3847d4a0 100644
--- a/src/PGF/Macros.hs
+++ b/src/PGF/Macros.hs
@@ -140,4 +140,8 @@ combinations t = case t of
   aa:uu -> [a:u | a <- aa, u <- combinations uu]
 
 isLiteralCat :: CId -> Bool
-isLiteralCat = (`elem` [mkCId "String", mkCId "Float", mkCId "Int"])
+isLiteralCat = (`elem` [cidString, cidFloat, cidInt])
+
+cidString = mkCId "String"
+cidInt    = mkCId "Int"
+cidFloat  = mkCId "Float"