According to an example embodiment, there is provided a method comprising determining a barring class to which a user equipment belongs, and determining a value for a barring timer, wherein determining the value for a barring timer uses a value derived from a system frame number, SFN, in which the user equipment received an access barring parameter. The method may further comprise initializing the barring timer to the determined value, starting the barring timer and determining, while the barring timer is running, whether a group of user equipment to which the user equipment belongs is barred.