diff --git a/tsproxy.go b/tsproxy.go
index a5112a5..709d1b2 100644
--- a/tsproxy.go
+++ b/tsproxy.go
@@ -506,5 +506,5 @@ func serveDiscovery(self string, targets []target) http.Handler {
 }
 
 func lerr(err error) slog.Attr {
-	return slog.String("err", err.Error())
+	return slog.Any("err", err)
 }