diff --git a/seafile-ldap.py b/seafile-ldap.py
index 6167629..56817d7 100644
--- a/seafile-ldap.py
+++ b/seafile-ldap.py
@@ -194,7 +194,7 @@ for ldapUser in ldapUsers:
         # add user to ldap table
         cnx = mysql.connector.connect(**dbconfig)
         cursor = cnx.cursor()
-        query = "INSERT INTO LDAPUsers (email, password, is_staff, is_active) VALUES ('{0}', "", {1}, {2})".format(ldapUser.mail, 0, 1)
+        query = "INSERT INTO LDAPUsers (email, password, is_staff, is_active) VALUES ('{0}', '', {1}, {2})".format(ldapUser.mail, 0, 1)
         logger.debug("Query: {0}".format(query))
         cursor.execute(query)
         cnx.commit()