diff --git a/hledger-lib/Hledger/Read/CsvReader.hs b/hledger-lib/Hledger/Read/CsvReader.hs
index 865457c32..4fceee399 100644
--- a/hledger-lib/Hledger/Read/CsvReader.hs
+++ b/hledger-lib/Hledger/Read/CsvReader.hs
@@ -509,6 +509,7 @@ directivep = (do
   return (d, v)
   ) <?> "directive"
 
+directives :: [String]
 directives =
   ["date-format"
   -- ,"default-account1"