diff --git a/hledger-lib/Hledger/Data/Dates.hs b/hledger-lib/Hledger/Data/Dates.hs
index ec68fe6bf..8e3d798ce 100644
--- a/hledger-lib/Hledger/Data/Dates.hs
+++ b/hledger-lib/Hledger/Data/Dates.hs
@@ -38,6 +38,8 @@ module Hledger.Data.Dates (
   nulldatespan,
   tests_Hledger_Data_Dates,
   failIfInvalidYear,
+  failIfInvalidMonth,
+  failIfInvalidDay,
   datesepchar,
   datesepchars,
   spanStart,