diff --git a/src/Convert/Enum.hs b/src/Convert/Enum.hs
index 6d86884..58d2b50 100644
--- a/src/Convert/Enum.hs
+++ b/src/Convert/Enum.hs
@@ -27,7 +27,7 @@ import qualified Data.Set as Set
 import Convert.Traverse
 import Language.SystemVerilog.AST
 
-type EnumInfo = ([Range], [(Identifier, Maybe Expr)])
+type EnumInfo = (Range, [(Identifier, Maybe Expr)])
 type Enums = Set.Set EnumInfo
 
 convert :: AST -> AST
@@ -47,9 +47,12 @@ convertDescription (description @ (Part _ _ _ _ _ _)) =
             traverseModuleItems (traverseExprs $ traverseNestedExprs traverseExpr) $
             description
         -- convert the collected enums into their corresponding localparams
-        itemType = Implicit Unspecified
+        itemType r = Implicit Unspecified [r]
         enumPairs = sortOn snd $ concatMap enumVals $ Set.toList enums
-        enumItems = map (\((r, x), v) -> MIDecl $ Localparam (itemType r) x v) enumPairs
+        enumItems = map toItem enumPairs
+        toItem ((r, x), v) =
+            MIDecl $ Localparam (itemType r) x v'
+            where v' = sizedExpr x r (simplify v)
 convertDescription other = other
 
 toBaseType :: Maybe Type -> Type
@@ -66,9 +69,9 @@ toBaseType (Just t) =
 traverseType :: Type -> Writer Enums Type
 traverseType (Enum t v rs) = do
     let baseType = toBaseType t
-    let (tf, r) = typeRanges baseType
-    () <- tell $ Set.singleton (map simplifyRange r, v)
-    return $ tf (r ++ rs)
+    let (tf, [r]) = typeRanges baseType
+    () <- tell $ Set.singleton (simplifyRange r, v)
+    return $ tf (r : rs)
 traverseType other = return other
 
 simplifyRange :: Range -> Range
@@ -80,7 +83,7 @@ traverseExpr :: Expr -> Expr
 traverseExpr (Cast (Left (Enum _ _ _)) e) = e
 traverseExpr other = other
 
-enumVals :: ([Range], [(Identifier, Maybe Expr)]) -> [(([Range], Identifier), Expr)]
+enumVals :: (Range, [(Identifier, Maybe Expr)]) -> [((Range, Identifier), Expr)]
 enumVals (r, l) =
     -- check for obviously duplicate values
     if noDuplicates
diff --git a/src/Convert/Struct.hs b/src/Convert/Struct.hs
index 58c8cae..8e637af 100644
--- a/src/Convert/Struct.hs
+++ b/src/Convert/Struct.hs
@@ -10,7 +10,6 @@ import Data.Maybe (fromJust, isJust)
 import Data.List (elemIndex, sortOn)
 import Data.Tuple (swap)
 import Control.Monad.Writer
-import Text.Read (readMaybe)
 import qualified Data.Map.Strict as Map
 
 import Convert.Traverse
@@ -253,23 +252,8 @@ convertAsgn structs types (lhs, expr) =
                 fieldNames = map snd fields
                 itemsFieldNames = map (fromJust . fst) items
                 itemPosition = \(Just x, _) -> fromJust $ elemIndex x fieldNames
-                packItem (Just x, Number n) =
-                    if size /= show resSize
-                        then error $ "literal " ++ show n ++ " for " ++ show x
-                                ++ " doesn't have struct field size " ++ show size
-                        else Number res
-                    where
-                        Number size = rangeSize $ lookupUnstructRange structTf x
-                        unticked = case n of
-                            '\'' : rest -> rest
-                            rest -> rest
-                        resSize = (read $ takeWhile (/= '\'') res) :: Int
-                        res = case readMaybe unticked :: Maybe Int of
-                            Nothing ->
-                                if unticked == n
-                                    then n
-                                    else size ++ n
-                            Just num -> size ++ "'d" ++ show num
+                packItem (Just x, e) = sizedExpr x r e
+                    where r = lookupUnstructRange structTf x
                 packItem (_, itemExpr) = itemExpr
         convertExpr _ other = other
 
diff --git a/src/Language/SystemVerilog/AST/Expr.hs b/src/Language/SystemVerilog/AST/Expr.hs
index 162d925..7e279de 100644
--- a/src/Language/SystemVerilog/AST/Expr.hs
+++ b/src/Language/SystemVerilog/AST/Expr.hs
@@ -16,6 +16,7 @@ module Language.SystemVerilog.AST.Expr
     , rangeSize
     , endianCondExpr
     , endianCondRange
+    , sizedExpr
     ) where
 
 import Data.List (intercalate)
@@ -187,3 +188,24 @@ endianCondRange r r1 r2 =
     ( endianCondExpr r (fst r1) (fst r2)
     , endianCondExpr r (snd r1) (snd r2)
     )
+
+-- attempts to make a number literal have an explicit size
+sizedExpr :: Identifier -> Range -> Expr -> Expr
+sizedExpr x r (Number n) =
+    if size /= show resSize
+        then error $ "literal " ++ show n ++ " for " ++ show x
+                ++ " doesn't have size " ++ show size
+        else Number res
+    where
+        Number size = simplify $ rangeSize r
+        unticked = case n of
+            '\'' : rest -> rest
+            rest -> rest
+        resSize = (read $ takeWhile (/= '\'') res) :: Int
+        res = case readMaybe unticked :: Maybe Int of
+            Nothing ->
+                if unticked == n
+                    then n
+                    else size ++ n
+            Just num -> size ++ "'d" ++ show num
+sizedExpr _ _ e = e