A method for determining a beamforming configuration for a multi-antenna system having at least two antennas and having a port-to-antenna mapping between antenna ports and antennas, wherein the method comprises: - obtaining (S1; S13) first feedback information originating from a wireless device relating to a multi-antenna transmission based on a first beamforming configuration enabling beamforming according to a first beam form, wherein the first beamforming configuration includes a first port-to-antenna mapping; - obtaining (S2; S14) second feedback information originating from the wireless device relating to a multi-antenna transmission based on a second, different beamforming configuration enabling beamforming according to a second, different beam form, wherein the second beamforming configuration includes a second, different port-to-antenna mapping, wherein the first feedback information includes first channel quality information and the second feedback information includes second channel quality information; - determining (S3; S15), based on the first feedback information and the second feedback information, a third beamforming configuration for the multi- antenna system including a third port-to-antenna mapping to enable beamforming according to a third beam form, wherein the third beamforming configuration is determined based on a comparison of the first channel quality information and the second channel quality information, wherein the third beamforming configuration is determined, if: the first beam form is wider than the second beam form and the first channel quality information is more than an offset better than the second channel quality information, such that the third beam form is wider than the second beam form, or the first beam form is wider than the second beam form and the second channel quality information is more than an offset better than the first channel quality information, such that the third beam form is narrower than the first beam form. - obtaining (S1; S13) first feedback information originating from a wireless device relating to a multi-antenna transmission based on a first beamforming configuration enabling beamforming according to a first beam form, wherein the first beamforming configuration includes a first port-to-antenna mapping; - obtaining (S2; S14) second feedback information originating from the wireless device relating to a multi-antenna transmission based on a second, different beamforming configuration enabling beamforming according to a second, different beam form, wherein the second beamforming configuration includes a second, different port-to-antenna mapping, wherein the first feedback information includes first channel quality information and the second feedback information includes second channel quality information; - determining (S3; S15), based on the first feedback information and the second feedback information, a third beamforming configuration for the multi- antenna system including a third port-to-antenna mapping to enable beamforming according to a third beam form, wherein the third beamforming configuration is determined based on a comparison of the first channel quality information and the second channel quality information, wherein the third beamforming configuration is determined, if: the first beam form is wider than the second beam form and the first channel quality information is more than an offset better than the second channel quality information, such that the third beam form is wider than the second beam form, or the first beam form is wider than the second beam form and the second channel quality information is more than an offset better than the first channel quality information, such that the third beam form is narrower than the first beam form. the first beam form is wider than the second beam form and the first channel quality information is more than an offset better than the second channel quality information, such that the third beam form is wider than the second beam form, or the first beam form is wider than the second beam form and the second channel quality information is more than an offset better than the first channel quality information, such that the third beam form is narrower than the first beam form.