diff --git a/CHANGELOG.md b/CHANGELOG.md
index daa7d6603..9484358eb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -18,6 +18,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
  - #1530, Fix how the PostgREST version is shown in the help text when the `.git` directory is not available - @monacoremo
  - #1094, Fix expired JWTs starting an empty transaction on the db - @steve-chavez
  - #1475, Fix location header for POST request with select= without PK (#1162) - @wolfgangwalther
+ - #1599, Fix error messages on connection failure for localized postgres on Windows (#1585) - @wolfgangwalther
 
 ### Changed
 
diff --git a/src/PostgREST/Error.hs b/src/PostgREST/Error.hs
index 174b02b4b..03a4d86ee 100644
--- a/src/PostgREST/Error.hs
+++ b/src/PostgREST/Error.hs
@@ -28,7 +28,7 @@ import Network.HTTP.Types.Header
 
 import PostgREST.Types
 import Protolude       hiding (toS)
-import Protolude.Conv  (toS)
+import Protolude.Conv  (toS, toSL)
 
 
 class (JSON.ToJSON a) => PgrstError a where
@@ -133,7 +133,7 @@ instance JSON.ToJSON P.UsageError where
   toJSON (P.ConnectionError e) = JSON.object [
     "code"    .= ("" :: Text),
     "message" .= ("Database connection error. Retrying the connection." :: Text),
-    "details" .= (toS $ fromMaybe "" e :: Text)]
+    "details" .= (toSL $ fromMaybe "" e :: Text)]
   toJSON (P.SessionError e) = JSON.toJSON e -- H.Error
 
 instance JSON.ToJSON H.QueryError where