Field description is missing in source code comment block.

[Takao Fujiwara <tfujiwar redhat com>]

When I try to build xml, I got the following error about IBusPropList::properties:

../../../src/ibusproplist.h:73: warning: Field description for IBusPropList::properties is missing in source 
code comment block.

https://github.com/ibus/ibus/blob/master/src/ibusproplist.h#L73
/**
 * IBusPropList:
 * @properties: GArray that holds IBusProperties.
 *
 * An array of IBusProperties.
 */
struct _IBusPropList {
    IBusSerializable parent;

    /*< public >*/
    GArray *properties;
};

How can I resolve this warning?