make warning: overriding commands for target

[Andriy Rysin]

When I am compiling kxkb I always get this warnings:

Makefile:1449: warning: overriding commands for target `kcmmiscwidget.moc'
Makefile:1274: warning: ignoring old commands for target `kcmmiscwidget.moc'
Makefile:1464: warning: overriding commands for target `kcmlayoutwidget.moc'
Makefile:1267: warning: ignoring old commands for target 
`kcmlayoutwidget.moc'


can anybody tell me if it's supposed to be there or it's just my 
environment?

Thanks,
Andriy