A radio network node (12) notifies wireless communication devices (14) in a wireless communication system (10) about an upcoming change of broadcasted system information. In this regard, the radio network node (12) broadcasts current system information (16A). The radio network node (12) also generates a notification (18) indicating that the radio network node (12) will broadcast changed system information (16B). This notification (18) is generated to indicate how the changed system information (16B) will differ from the current system information (16A). The radio network node (12) moreover transmits the notification (18) and, after transmitting the notification (18), broadcasts the changed system information (16B).