diff --git a/lib/SimpleSAML/Auth/LDAP.php b/lib/SimpleSAML/Auth/LDAP.php
index d7136a96269c8d870b6ec315c97c5e5819cd4211..ab2439aa70f7d49c32d2279ae7ded59b2c1f275c 100644
--- a/lib/SimpleSAML/Auth/LDAP.php
+++ b/lib/SimpleSAML/Auth/LDAP.php
@@ -127,7 +127,7 @@ class SimpleSAML_Auth_LDAP {
 				return NULL;
 			} else {
 				throw new Exception('LDAP search returned zero entries: ' . $searchattr . '=' . $searchvalue . ' base(s): ' . 
-					join(' & ', $searchbases));
+					join(' & ', $searchbases));
 			}
 		}