This is an appeal from an order modifying downward the amount of alimony to be paid by appellant to appellee. We find no error in the modification except that the judge failed to apply it retroactive to the date of the filing of the petition. See Witcher v. Petty, 534 So.2d 1240 (Fla. 5th DCA 1988).

AFFIRMED in part; REVERSED in part and REMANDED for entry of an amended order applying the alimony reduction retroactively.