diff --git a/phpseclib/Crypt/RSA.php b/phpseclib/Crypt/RSA.php
index e26fe41d..22387be3 100644
--- a/phpseclib/Crypt/RSA.php
+++ b/phpseclib/Crypt/RSA.php
@@ -878,9 +878,9 @@ class RSA
                 );
                 $key = "openssh-key-v1\0$key";
 
-                return "-----BEGIN OPENSSH PRIVATE KEY-----\r\n" .
-                       chunk_split(base64_encode($key), 70) .
-                       "-----END OPENSSH PRIVATE KEY-----";
+                return "-----BEGIN OPENSSH PRIVATE KEY-----\n" .
+                       chunk_split(base64_encode($key), 70, "\n") .
+                       "-----END OPENSSH PRIVATE KEY-----\n";
             default: // eg. self::PRIVATE_FORMAT_PKCS1
                 $components = array();
                 foreach ($raw as $name => $value) {