problemas con triggers

[alfa18]

hola amigos,
tengo problemas con este trigger y no veo donde esta el error ¿me echais una mano?

el trigger en cuestion es este:

Código MySQL:

CREATE TRIGGER k2 BEFORE INSERT ON k FOR EACH ROW BEGIN IF District IS NULL OR District= '' THEN SET NEW.District='Unknown';end if;
 

.. y los errores que obtengo son estos:
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'end if' at line 1