diff --git a/seafile-ldap.py b/seafile-ldap.py
index 4980023..8b828df 100644
--- a/seafile-ldap.py
+++ b/seafile-ldap.py
@@ -167,7 +167,7 @@ for ldapUser in ldapUsers:
     cnx = mysql.connector.connect(**dbconfig)
     cursor = cnx.cursor()
     query = ("SELECT * FROM LDAPUsers WHERE email = %s")
-    cursor.execute(query, (ldapUser.mail,))
+    cursor.execute(query, (str(ldapUser.mail),))
     logger.debug("Cursor: {0}".format(cursor))
     row_count = cursor.rowcount
     logger.debug("Found {0} SQL LDAP users".format(cursor.rowcount))