diff --git a/hledger-lib/hledger_csv.m4.md b/hledger-lib/hledger_csv.m4.md
index 533d59f78..188d62279 100644
--- a/hledger-lib/hledger_csv.m4.md
+++ b/hledger-lib/hledger_csv.m4.md
@@ -428,7 +428,8 @@ a default account name will be chosen (like expenses:unknown or income:unknown).
 For convenience and backwards compatibility, if you set the amount of
 posting 1 only, a second posting with the negative amount will be
 generated automatically.
-(This also means you can't generate a transaction with just one posting.)
+(Unless the account name is parenthesised indicating an 
+[unbalanced posting](journal.html#virtual-postings).)
 
 If the CSV has the currency symbol in a separate field, you can use
 `currencyN` to prepend it to posting N's amount. `currency` with no N