diff --git a/lib/SimpleSAML/Auth/LDAP.php b/lib/SimpleSAML/Auth/LDAP.php
index 25fda9de8d5fb3083ff343b0e07a5af76e9fa2de..04cd9e31d5be4fd5940ed05a0143e5851a3657ed 100644
--- a/lib/SimpleSAML/Auth/LDAP.php
+++ b/lib/SimpleSAML/Auth/LDAP.php
@@ -169,7 +169,7 @@ class SimpleSAML_Auth_LDAP {
 	 * @return A LDAP search filter.
 	 */
 	private function generateSearchFilter($searchattr, $searchvalue) {
-		$searchattr = self::escape_filter_value($searchattr);
+		$searchattr = self::escape_filter_value($searchattr, FALSE);
 		$searchvalue = self::escape_filter_value($searchvalue);
 		
 		if (is_array($searchattr)) {