A yawing system for a wind turbine with a tower construction and a nacelle includes a stationary part associated with the tower construction, and a rotating part being associated with the nacelle. The rotating part is allowed to rotate relative to the stationary part via a gear connection. The rotating part includes a plurality of modules, each having a sub-module, the sub-modules substantially identical in size and shape. Each module is configurable to perform various functions by positioning one or more function defining elements in the corresponding sub-module. Thereby a configured module belongs to a category of modules reflecting the function of the configured module. A module belonging to a category may be replaced or reconfigured to belong to a different category of modules without altering the main design of the rotating part.