diff --git a/src/GF/Compile/GeneratePMCFG.hs b/src/GF/Compile/GeneratePMCFG.hs
index 20ba80e2e..e05ef5afa 100644
--- a/src/GF/Compile/GeneratePMCFG.hs
+++ b/src/GF/Compile/GeneratePMCFG.hs
@@ -268,11 +268,13 @@ emptyFRulesEnv cnc_defs lincats =
     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/Data.hs b/src/PGF/Data.hs
index f50a49c31..644e33750 100644
--- a/src/PGF/Data.hs
+++ b/src/PGF/Data.hs
@@ -122,7 +122,7 @@ type Profile = [Int]
 data Production
   = FApply  {-# UNPACK #-} !FunId [FCat]
   | FCoerce {-# UNPACK #-} !FCat
-  | FLit    Literal String
+  | FConst  Tree String
   deriving (Eq,Ord,Show)
 data FFun  = FFun CId [Profile] {-# UNPACK #-} !(UArray FIndex SeqId) deriving (Eq,Ord,Show)
 type FSeq  = Array FPointPos FSymbol
diff --git a/src/PGF/Parsing/FCFG/Incremental.hs b/src/PGF/Parsing/FCFG/Incremental.hs
index 12063f2a9..2ab04acf2 100644
--- a/src/PGF/Parsing/FCFG/Incremental.hs
+++ b/src/PGF/Parsing/FCFG/Incremental.hs
@@ -45,26 +45,27 @@ initState pinfo start =
 nextState :: ParseState -> String -> Maybe ParseState
 nextState (State pinfo chart items) t =
   let (items1,chart1) = process add (sequences pinfo) (functions pinfo) (Set.toList items) Set.empty chart
-      (items2,chart2) = addLiteral pinfo (AK fcatString 0) (LStr t) t items1 chart1
-      (items3,chart3) = case reads t of {[(n,"")] -> addLiteral pinfo (AK fcatInt   0) (LInt n) t items2 chart2;
+      (items2,chart2) = addConst pinfo (AK fcatString 0) (Lit (LStr t)) t items1 chart1
+      (items3,chart3) = case reads t of {[(n,"")] -> addConst pinfo (AK fcatInt   0) (Lit (LInt n)) t items2 chart2;
                                          _        -> (items2,chart2)}
-      (items4,chart4) = case reads t of {[(d,"")] -> addLiteral pinfo (AK fcatFloat 0) (LFlt d) t items3 chart3;
+      (items4,chart4) = case reads t of {[(d,"")] -> addConst pinfo (AK fcatFloat 0) (Lit (LFlt d)) t items3 chart3;
                                          _        -> (items3,chart3)}
-      chart5 = chart4{ active =emptyAC
-                     , actives=active chart4 : actives chart4
+      (items5,chart5) = addConst pinfo (AK fcatVar 0) (Var (mkCId t)) t items4 chart4
+      chart6 = chart5{ active =emptyAC
+                     , actives=active chart5 : actives chart5
                      , passive=emptyPC
-                     , offset =offset chart4+1
+                     , offset =offset chart5+1
                      }
-  in if Set.null items4
+  in if Set.null items5
        then Nothing
-       else Just (State pinfo chart5 items4)
+       else Just (State pinfo chart6 items5)
   where
     add (KS tok) item set
       | tok == t  = Set.insert item set
       | otherwise = set
 
-addLiteral :: ParserInfo -> ActiveKey -> Literal -> String -> Set.Set Active -> Chart -> (Set.Set Active,Chart)
-addLiteral pinfo key lit s items chart =
+addConst :: ParserInfo -> ActiveKey -> Tree -> String -> Set.Set Active -> Chart -> (Set.Set Active,Chart)
+addConst pinfo key const s items chart =
   case lookupAC key (active chart) of
     Nothing  -> (items,chart)
     Just set -> let fid = nextId chart
@@ -73,7 +74,7 @@ addLiteral pinfo key lit s items chart =
                                            let FSymCat d _ = unsafeAt (unsafeAt (sequences pinfo) seqid) ppos
                                            in Set.insert (Active j (ppos+1) funid seqid (updateAt d fid args) key)) items set
 
-                    chart1 = chart{forest =IntMap.insert fid (Set.singleton (FLit lit s)) (forest chart)
+                    chart1 = chart{forest =IntMap.insert fid (Set.singleton (FConst const s)) (forest chart)
                                   ,nextId =nextId chart+1
                                   }
                 in (items1,chart1)
@@ -119,7 +120,7 @@ extractExps (State pinfo chart items) start = exps
                                                      return (Fun fn args)
                                                   `mplus`
                                                   trees)
-                                            (\lit _ trees -> Lit lit : trees)
+                                            (\const _ trees -> const : trees)
                                             [] fcat (forest st)
 
 
@@ -236,7 +237,7 @@ insertPC key fcat chart = Map.insert key fcat chart
 -- Forest
 ----------------------------------------------------------------
 
-foldForest :: (FunId -> [FCat] -> b -> b) -> (Literal -> String -> b -> b) -> b -> FCat -> IntMap.IntMap (Set.Set Production) -> b
+foldForest :: (FunId -> [FCat] -> b -> b) -> (Tree -> String -> b -> b) -> b -> FCat -> IntMap.IntMap (Set.Set Production) -> b
 foldForest f g b fcat forest =
   case IntMap.lookup fcat forest of
     Nothing  -> b
@@ -244,7 +245,7 @@ foldForest f g b fcat forest =
   where
     foldProd (FCoerce fcat)      b = foldForest f g b fcat forest
     foldProd (FApply funid args) b = f funid args b
-    foldProd (FLit lit s)        b = g lit s b
+    foldProd (FConst const s)    b = g const s b
 
 
 ----------------------------------------------------------------