diff --git a/hledger-lib/Hledger/Data/Amount.hs b/hledger-lib/Hledger/Data/Amount.hs
index f45cbc3c7..a75909dcc 100644
--- a/hledger-lib/Hledger/Data/Amount.hs
+++ b/hledger-lib/Hledger/Data/Amount.hs
@@ -101,11 +101,7 @@ module Hledger.Data.Amount (
 ) where
 
 import Data.Char (isDigit)
-#ifdef DOUBLE
-roundTo = flip const
-#else
 import Data.Decimal (roundTo)
-#endif
 import Data.Function (on)
 import Data.List
 import Data.Map (findWithDefault)
@@ -211,16 +207,8 @@ isZeroAmount a --  a==missingamt = False
                | otherwise     = (null . filter (`elem` digits) . showAmountWithoutPriceOrCommodity) a
 
 -- | Is this amount "really" zero, regardless of the display precision ?
--- Since we are using floating point, for now just test to some high precision.
 isReallyZeroAmount :: Amount -> Bool
-isReallyZeroAmount Amount{aquantity=q} = iszero q
-  where
-   iszero =
-#ifdef DOUBLE
-    null . filter (`elem` digits) . printf ("%."++show zeroprecision++"f") where zeroprecision = 8
-#else
-    (==0)
-#endif
+isReallyZeroAmount Amount{aquantity=q} = q == 0
 
 -- | Get the string representation of an amount, based on its commodity's
 -- display settings except using the specified precision.
@@ -292,15 +280,9 @@ showamountquantity Amount{aquantity=q, astyle=AmountStyle{asprecision=p, asdecim
     where
       -- isint n = fromIntegral (round n) == n
       qstr -- p == maxprecision && isint q = printf "%d" (round q::Integer)
-#ifdef DOUBLE
-        | p == maxprecisionwithpoint = printf "%f" q
-        | p == maxprecision          = chopdotzero $ printf "%f" q
-        | otherwise                  = printf ("%."++show p++"f") q
-#else
         | p == maxprecisionwithpoint = show q
         | p == maxprecision          = chopdotzero $ show q
         | otherwise                  = show $ roundTo (fromIntegral p) q
-#endif
 
 -- | Replace a number string's decimal point with the specified character,
 -- and add the specified digit group separators. The last digit group will
diff --git a/hledger-lib/Hledger/Data/Types.hs b/hledger-lib/Hledger/Data/Types.hs
index 1aaaa462b..6e85df171 100644
--- a/hledger-lib/Hledger/Data/Types.hs
+++ b/hledger-lib/Hledger/Data/Types.hs
@@ -24,10 +24,8 @@ import GHC.Generics (Generic)
 import Control.DeepSeq (NFData)
 import Control.Monad.Except (ExceptT)
 import Data.Data
-#ifndef DOUBLE
 import Data.Decimal
 import Text.Blaze (ToMarkup(..))
-#endif
 import qualified Data.Map as M
 import Data.Time.Calendar
 import Data.Time.LocalTime
@@ -64,13 +62,7 @@ data Side = L | R deriving (Eq,Show,Read,Ord,Typeable,Data,Generic)
 
 instance NFData Side
 
--- | The basic numeric type used in amounts. Different implementations
--- can be selected via cabal flag for testing and benchmarking purposes.
-numberRepresentation :: String
-#ifdef DOUBLE
-type Quantity = Double
-numberRepresentation = "Double"
-#else
+-- | The basic numeric type used in amounts.
 type Quantity = Decimal
 deriving instance Data (Quantity)
 -- The following is for hledger-web, and requires blaze-markup.
@@ -78,8 +70,6 @@ deriving instance Data (Quantity)
 instance ToMarkup (Quantity)
  where
    toMarkup = toMarkup . show
-numberRepresentation = "Decimal"
-#endif
 
 -- | An amount's price (none, per unit, or total) in another commodity.
 -- Note the price should be a positive number, although this is not enforced.
diff --git a/hledger-lib/hledger-lib.cabal b/hledger-lib/hledger-lib.cabal
index 7e948c5ab..6f5f692e9 100644
--- a/hledger-lib/hledger-lib.cabal
+++ b/hledger-lib/hledger-lib.cabal
@@ -61,8 +61,6 @@ flag old-locale
     if true then depend on time < 1.5 together with old-locale.
 
 library
-  if flag(double)
-    cpp-options: -DDOUBLE
   ghc-options: -Wall -fno-warn-unused-do-bind -fno-warn-name-shadowing -fno-warn-missing-signatures -fno-warn-type-defaults -fno-warn-orphans
   build-depends:
       base >= 4.3 && < 5
diff --git a/hledger/Hledger/Cli/Version.hs b/hledger/Hledger/Cli/Version.hs
index 9fed1ea7a..2e73f28a7 100644
--- a/hledger/Hledger/Cli/Version.hs
+++ b/hledger/Hledger/Cli/Version.hs
@@ -14,7 +14,6 @@ where
 import System.Info (os, arch)
 import Text.Printf
 
-import Hledger.Data.Types (numberRepresentation)
 import Hledger.Utils
 
 
@@ -27,7 +26,7 @@ version = VERSION
 version = "dev build"
 #endif
 prognameandversion = progname ++ " " ++ version
-prognameanddetailedversion = printf "%s %s, using %s" progname version numberRepresentation
+prognameanddetailedversion = printf "%s %s" progname version
 
 -- developer build version strings include PATCHLEVEL (number of
 -- patches since the last tag). If defined, it must be a number.