diff --git a/api/src/Mail/Smime/PassphraseMissing.php b/api/src/Mail/Smime/PassphraseMissing.php
new file mode 100644
index 0000000000..4e0f5ddf5c
--- /dev/null
+++ b/api/src/Mail/Smime/PassphraseMissing.php
@@ -0,0 +1,23 @@
+<?php
+/**
+ * EGroupware API - Exceptions
+ *
+ * @link http://www.egroupware.org
+ * @author Hadi Nategh <hn@egroupware.org>
+ * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
+ * @package Mail
+ * @subpackage Smime
+ * @access public
+ * @version $Id$
+ */
+
+namespace EGroupware\Api\Mail\Smime;
+
+use EGroupware\Api;
+
+/**
+ * Smime passphrase missing exception
+ *
+ * As you get this only by an error in the code or during development, the message does not need to be translated
+ */
+class PassphraseMissing extends Api\Exception\AssertionFailed { }