diff --git a/tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py b/tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py
index d9c73b8221ab9b20dc1e25ab2242b8c546416bff..4e8c5d781a5938362b4f52353311f0f622f97691 100644
--- a/tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py
+++ b/tangostationcontrol/tangostationcontrol/devices/sdp/beamlet.py
@@ -657,7 +657,10 @@ class Beamlet(OPCUADevice):
 
         # Set MAC, IP, port
         for setting, value_if_undefined in [
-            ("FPGA_beamlet_output_multiple_hdr_eth_destination_mac_RW", "00:00:00:00:00:00"),
+            (
+                "FPGA_beamlet_output_multiple_hdr_eth_destination_mac_RW",
+                "00:00:00:00:00:00",
+            ),
             ("FPGA_beamlet_output_multiple_hdr_ip_destination_address_RW", "0.0.0.0"),
             ("FPGA_beamlet_output_multiple_hdr_udp_destination_port_RW", 0),
         ]: