In a method for avoiding an error detection of control channels in a mobile-radio device, a transmitter device transmits control signals on control channels which are received and decoded by the mobile-radio device. A control channel contains a bit sequence and a check-value of the bit sequence. In the case of a successful check-value comparison, the mobile-radio device accepts the control channel and otherwise rejects the control channel. A control channel, which has not been allocated to a mobile-radio device is defined with a filler sequence which dedicates in the case of a check-value comparison and always leads to the rejection of the control channel.