diff --git a/hledger/Hledger/Cli/Commands/Check/Ordereddates.hs b/hledger/Hledger/Cli/Commands/Check/Ordereddates.hs
index d867649c4..14fb2df6b 100755
--- a/hledger/Hledger/Cli/Commands/Check/Ordereddates.hs
+++ b/hledger/Hledger/Cli/Commands/Check/Ordereddates.hs
@@ -1,8 +1,13 @@
+{-# LANGUAGE CPP #-}
+
 module Hledger.Cli.Commands.Check.Ordereddates (
   journalCheckOrdereddates
 )
 where
 
+#if !(MIN_VERSION_base(4,11,0))
+import Data.Semigroup ((<>))
+#endif
 import qualified Data.Text as T
 import Hledger
 import Hledger.Cli.CliOptions
diff --git a/hledger/Hledger/Cli/Commands/Check/Uniqueleafnames.hs b/hledger/Hledger/Cli/Commands/Check/Uniqueleafnames.hs
index 1fd112a06..07309df37 100755
--- a/hledger/Hledger/Cli/Commands/Check/Uniqueleafnames.hs
+++ b/hledger/Hledger/Cli/Commands/Check/Uniqueleafnames.hs
@@ -14,7 +14,6 @@ import Data.Text (Text)
 import Data.Semigroup ((<>))
 #endif
 import qualified Data.Text as T
-import qualified Data.Text.IO as T
 import Hledger
 
 journalCheckUniqueleafnames :: Journal -> Either String ()