diff --git a/cmd/sts-errors.go b/cmd/sts-errors.go
index d42ef6f38..f620a73cd 100644
--- a/cmd/sts-errors.go
+++ b/cmd/sts-errors.go
@@ -48,14 +48,10 @@ func writeSTSErrorResponse(ctx context.Context, w http.ResponseWriter, isErrCode
 	if errCtxt != nil {
 		stsErrorResponse.Error.Message = errCtxt.Error()
 	}
-	var logKind logger.Kind
 	switch errCode {
-	case ErrSTSInternalError, ErrSTSNotInitialized:
-		logKind = logger.Minio
-	default:
-		logKind = logger.All
+	case ErrSTSInternalError, ErrSTSNotInitialized, ErrSTSUpstreamError:
+		logger.LogIf(ctx, errCtxt, logger.Minio)
 	}
-	logger.LogIf(ctx, errCtxt, logKind)
 	encodedErrorResponse := encodeResponse(stsErrorResponse)
 	writeResponse(w, err.HTTPStatusCode, encodedErrorResponse, mimeXML)
 }