diff --git a/src/IDF/Key.php b/src/IDF/Key.php
index 7119e7f..e933d52 100644
--- a/src/IDF/Key.php
+++ b/src/IDF/Key.php
@@ -80,7 +80,10 @@ class IDF_Key extends Pluf_Model
         if (preg_match('#^\[pubkey ([^\]]+)\]\s*(\S+)\s*\[end\]$#', $this->content, $m)) {
             return array('mtn', $m[1], $m[2]);
         }
-        else if (preg_match('#^ssh\-[a-z]{3}\s(\S+)(?:\s(\S+))?$#', $this->content, $m)) {
+        else if (preg_match('#^ssh\-[a-z]{3}\s(\S+)(?:\s(\S*))?$#', $this->content, $m)) {
+            if (!isset($m[2])) {
+                $m[2] = "";
+            }
             return array('ssh', $m[2], $m[1]);
         }