If and are Banach lattices such that is separable and has the countable interpolation property, then the space of all continuous regular operators ![$\mathcal{L}$](http://www.ams.org/proc/2001-129-02/S0002-9939-00-05592-1/gif-abstract0/img5.gif) has the Riesz decomposition property. This result is a positive answer to a conjecture posed by A. W. Wickstead. |