diff --git a/addressbook/inc/class.addressbook_ui.inc.php b/addressbook/inc/class.addressbook_ui.inc.php
index 7ea15e7e8a..ca763c040d 100644
--- a/addressbook/inc/class.addressbook_ui.inc.php
+++ b/addressbook/inc/class.addressbook_ui.inc.php
@@ -2600,12 +2600,10 @@ window.egw_LAB.wait(function() {
 		$matches = null;
 		$fields = explode(',',$GLOBALS['egw_info']['user']['preferences']['addressbook']['duplicate_fields']);
 
-		if (preg_match('/^exec\[([^\]]+)\]$/', $name, $matches)) $name = $matches[1];	// remove exec[ ]
-
 		$ret = array('doublicates' => array(), 'msg' => null);
 
 		// if email changed, check for doublicates
-		if (in_array($name, array('email', 'email_home')) && in_array($name, $fields))
+		if (in_array($name, array('email', 'email_home')) && in_array('contact_'.$name, $fields))
 		{
 			if (preg_match(Etemplate\Widget\Url::EMAIL_PREG, $values[$name]))	// only search for real email addresses, to not return to many contacts
 			{