diff --git a/hledger/Hledger/Cli/Balancesheet.hs b/hledger/Hledger/Cli/Balancesheet.hs
index dea632c10..d7ae2c82e 100644
--- a/hledger/Hledger/Cli/Balancesheet.hs
+++ b/hledger/Hledger/Cli/Balancesheet.hs
@@ -24,7 +24,10 @@ import Hledger.Cli.Balance
 balancesheetmode = (defCommandMode $ ["balancesheet"]++aliases) {
   modeHelp = "show a balance sheet" `withAliases` aliases
  ,modeGroupFlags = Group {
-     groupUnnamed = []
+     groupUnnamed = [
+      flagNone ["flat"] (\opts -> setboolopt "flat" opts) "show full account names, unindented"
+     ,flagReq  ["drop"] (\s opts -> Right $ setopt "drop" s opts) "N" "with --flat, omit this many leading account name components"
+     ]
     ,groupHidden = []
     ,groupNamed = [generalflagsgroup1]
     }