diff --git a/hledger-lib/Hledger/Data/Amount.hs b/hledger-lib/Hledger/Data/Amount.hs
index e48554d62..8027219b1 100644
--- a/hledger-lib/Hledger/Data/Amount.hs
+++ b/hledger-lib/Hledger/Data/Amount.hs
@@ -83,9 +83,9 @@ module Hledger.Data.Amount (
   showAmountWithZeroCommodity,
   showAmountDebug,
   showAmountWithoutPrice,
-  setAmountPrecision,
+  amountSetPrecision,
   withPrecision,
-  setFullPrecision,
+  amountSetFullPrecision,
   setAmountInternalPrecision,
   withInternalPrecision,
   setAmountDecimalPoint,
@@ -129,7 +129,8 @@ module Hledger.Data.Amount (
   showMixedAmountLinesB,
   wbToText,
   wbUnpack,
-  setMixedAmountPrecision,
+  mixedAmountSetPrecision,
+  mixedAmountSetFullPrecision,
   canonicaliseMixedAmount,
   -- * misc.
   ltraceamount,
@@ -330,17 +331,17 @@ amountIsZero Amount{aquantity=q} = q == 0
 
 -- | Set an amount's display precision, flipped.
 withPrecision :: Amount -> AmountPrecision -> Amount
-withPrecision = flip setAmountPrecision
+withPrecision = flip amountSetPrecision
 
 -- | Set an amount's display precision.
-setAmountPrecision :: AmountPrecision -> Amount -> Amount
-setAmountPrecision p a@Amount{astyle=s} = a{astyle=s{asprecision=p}}
+amountSetPrecision :: AmountPrecision -> Amount -> Amount
+amountSetPrecision p a@Amount{astyle=s} = a{astyle=s{asprecision=p}}
 
 -- | Increase an amount's display precision, if needed, to enough decimal places
 -- to show it exactly (showing all significant decimal digits, excluding trailing
 -- zeros).
-setFullPrecision :: Amount -> Amount
-setFullPrecision a = setAmountPrecision p a
+amountSetFullPrecision :: Amount -> Amount
+amountSetFullPrecision a = amountSetPrecision p a
   where
     p                = max displayprecision naturalprecision
     displayprecision = asprecision $ astyle a
@@ -841,8 +842,13 @@ ltraceamount :: String -> MixedAmount -> MixedAmount
 ltraceamount s = traceWith (((s ++ ": ") ++).showMixedAmount)
 
 -- | Set the display precision in the amount's commodities.
-setMixedAmountPrecision :: AmountPrecision -> MixedAmount -> MixedAmount
-setMixedAmountPrecision p = mapMixedAmount (setAmountPrecision p)
+mixedAmountSetPrecision :: AmountPrecision -> MixedAmount -> MixedAmount
+mixedAmountSetPrecision p = mapMixedAmount (amountSetPrecision p)
+
+-- | In each component amount, increase the display precision sufficiently
+-- to render it exactly (showing all significant decimal digits).
+mixedAmountSetFullPrecision :: MixedAmount -> MixedAmount
+mixedAmountSetFullPrecision = mapMixedAmount amountSetFullPrecision
 
 mixedAmountStripPrices :: MixedAmount -> MixedAmount
 mixedAmountStripPrices = mapMixedAmount (\a -> a{aprice=Nothing})
diff --git a/hledger-lib/Hledger/Data/Journal.hs b/hledger-lib/Hledger/Data/Journal.hs
index 913f17022..dc4fcf5e8 100644
--- a/hledger-lib/Hledger/Data/Journal.hs
+++ b/hledger-lib/Hledger/Data/Journal.hs
@@ -1278,7 +1278,7 @@ journalApplyAliases aliases j =
 --     [ "P"
 --     , showDate (pddate pd)
 --     , T.unpack (pdcommodity pd)
---     , (showAmount . setAmountPrecision maxprecision) (pdamount pd
+--     , (showAmount . amountSetPrecision maxprecision) (pdamount pd
 --     )
 --     ]
 
diff --git a/hledger-lib/Hledger/Read/TimedotReader.hs b/hledger-lib/Hledger/Read/TimedotReader.hs
index e8bc0eced..2e17f4100 100644
--- a/hledger-lib/Hledger/Read/TimedotReader.hs
+++ b/hledger-lib/Hledger/Read/TimedotReader.hs
@@ -182,7 +182,7 @@ entryp = do
         tstatus    = Cleared,
         tpostings  = [
           nullposting{paccount=a
-                     ,pamount=Mixed [setAmountPrecision (Precision 2) $ num hours]  -- don't assume hours; do set precision to 2
+                     ,pamount=Mixed [amountSetPrecision (Precision 2) $ num hours]  -- don't assume hours; do set precision to 2
                      ,ptype=VirtualPosting
                      ,ptransaction=Just t
                      }
diff --git a/hledger-ui/Hledger/UI/TransactionScreen.hs b/hledger-ui/Hledger/UI/TransactionScreen.hs
index c437e95d4..09ff044e8 100644
--- a/hledger-ui/Hledger/UI/TransactionScreen.hs
+++ b/hledger-ui/Hledger/UI/TransactionScreen.hs
@@ -72,7 +72,7 @@ tsDraw UIState{aopts=UIOpts{cliopts_=copts@CliOpts{reportspec_=rspec@ReportSpec{
     _          -> [maincontent]
   where
     -- as with print, show amounts with all of their decimal places
-    t = transactionMapPostingAmounts setFullPrecision t'
+    t = transactionMapPostingAmounts amountSetFullPrecision t'
     maincontent = Widget Greedy Greedy $ do
       let
         prices = journalPriceOracle (infer_value_ ropts) j
diff --git a/hledger/Hledger/Cli/Commands/Add.hs b/hledger/Hledger/Cli/Commands/Add.hs
index eb11ad280..df6f65dc3 100644
--- a/hledger/Hledger/Cli/Commands/Add.hs
+++ b/hledger/Hledger/Cli/Commands/Add.hs
@@ -373,7 +373,7 @@ amountAndCommentWizard PrevInput{..} EntryState{..} = do
       balancingamt = negate $ sum $ map pamount realps where realps = filter isReal esPostings
       balancingamtfirstcommodity = Mixed $ take 1 $ amounts balancingamt
       showamt =
-        showMixedAmount . setMixedAmountPrecision
+        showMixedAmount . mixedAmountSetPrecision
                   -- what should this be ?
                   -- 1 maxprecision (show all decimal places or none) ?
                   -- 2 maxprecisionwithpoint (show all decimal places or .0 - avoids some but not all confusion with thousands separators) ?
diff --git a/hledger/Hledger/Cli/Commands/Close.hs b/hledger/Hledger/Cli/Commands/Close.hs
index fa1b78122..911ab2fe9 100755
--- a/hledger/Hledger/Cli/Commands/Close.hs
+++ b/hledger/Hledger/Cli/Commands/Close.hs
@@ -93,7 +93,7 @@ close CliOpts{rawopts_=rawopts, reportspec_=rspec} j = do
 
     -- since balance assertion amounts are required to be exact, the
     -- amounts in opening/closing transactions should be too (#941, #1137)
-    precise = setFullPrecision
+    precise = amountSetFullPrecision
 
     -- interleave equity postings next to the corresponding closing posting, or put them all at the end ?
     interleaved = boolopt "interleaved" rawopts
diff --git a/hledger/Hledger/Cli/Commands/Print.hs b/hledger/Hledger/Cli/Commands/Print.hs
index 0e96d370b..fea2eaf5d 100644
--- a/hledger/Hledger/Cli/Commands/Print.hs
+++ b/hledger/Hledger/Cli/Commands/Print.hs
@@ -60,7 +60,7 @@ print' opts j = do
   -- that. For now we try to reverse it by increasing all amounts' decimal places 
   -- sufficiently to show the amount exactly. The displayed amounts may have minor
   -- differences from the originals, such as trailing zeroes added.
-  let j' = journalMapPostingAmounts setFullPrecision j
+  let j' = journalMapPostingAmounts amountSetFullPrecision j
   case maybestringopt "match" $ rawopts_ opts of
     Nothing   -> printEntries opts j'
     Just desc -> printMatch opts j' $ T.pack desc