diff --git a/hledger-lib/Hledger/Data/Balancing.hs b/hledger-lib/Hledger/Data/Balancing.hs
index 031a6e888..5f3c9767c 100644
--- a/hledger-lib/Hledger/Data/Balancing.hs
+++ b/hledger-lib/Hledger/Data/Balancing.hs
@@ -131,11 +131,17 @@ transactionCheckBalanced BalancingOpts{commodity_styles_} t = errs
         rmsg
           | rsumok        = ""
           | not rsignsok  = "The real postings all have the same sign. Consider negating some of them."
-          | otherwise     = "The real postings' sum should be 0 but is: " ++ showMixedAmountOneLineWithoutCost False rsumcost
+          | otherwise     = "The real postings' sum should be 0 but is: " ++
+              (showMixedAmountWith oneLineNoCostFmt{displayCost=True, displayZeroCommodity=True} $
+              mixedAmountSetFullPrecisionUpTo Nothing $ mixedAmountSetFullPrecision
+              rsumcost)
         bvmsg
           | bvsumok       = ""
           | not bvsignsok = "The balanced virtual postings all have the same sign. Consider negating some of them."
-          | otherwise     = "The balanced virtual postings' sum should be 0 but is: " ++ showMixedAmountOneLineWithoutCost False bvsumcost
+          | otherwise     = "The balanced virtual postings' sum should be 0 but is: " ++
+              (showMixedAmountWith oneLineNoCostFmt{displayCost=True, displayZeroCommodity=True} $
+              mixedAmountSetFullPrecisionUpTo Nothing $ mixedAmountSetFullPrecision
+              bvsumcost)
 
 -- | Legacy form of transactionCheckBalanced.
 isTransactionBalanced :: BalancingOpts -> Transaction -> Bool