<p>It is presented a method for determining first signalling priority of a message of a signalling radio bearer of a first service. The method is performed in a radio network node of a cellular communication network and comprises the steps of: obtaining a first data priority associated with a data radio bearer of the first service; obtaining a second data priority associated with a data radio bearer of a second service; determining the first signalling priority to be lower than or equal to the second data priority when the second data priority is higher than the first data priority; and assigning the first signalling priority to the message of the signalling radio bearer of the first service. Corresponding radio network nodes, computer program and computer program product are also presented.</p>
