diff --git a/seafile-ldap.py b/seafile-ldap.py
index b92fefa..15f4235 100644
--- a/seafile-ldap.py
+++ b/seafile-ldap.py
@@ -167,7 +167,7 @@ for ldapUser in ldapUsers:
     cnx = mysql.connector.connect(**dbconfig)
     logger.debug("SQL Connection: {0}".format(cnx))
     cursor = cnx.cursor()
-    query = ("SELECT * FROM LDAPUsers WHERE email = {0}".format(ldapUser.mail))
+    query = ("SELECT * FROM LDAPUsers WHERE email = '{0}'".format(ldapUser.mail))
     cursor.execute(query)
     sqlLDAPuser = cursor.fetchall()
     print(sqlLDAPuser)