The present invention addresses method, apparatus and computer program product for handling of secondary scheduling request in carrier aggregation. Thereby, a message comprising a request of radio resources for uplink transmission from the user equipment to a base station is composed, it is determined whether the user equipment is in a carrier aggregation mode in which two or more carriers are aggregated forming one primary cell and at least one secondary cell, the primary cell and at least one secondary cell supporting physical uplink control channel, the message is assigned to a physical uplink control channel, wherein assigning is permitted to the physical uplink control channel of the primary cell and a physical uplink control channel of any of the at least one secondary cell, and transmission of the message is caused using the assigned physical uplink control channel.