@@ -2,7 +2,7 @@ include zephyr-sample.inc
ZEPHYR_SRC_DIR = "${S}/samples/net/openthread/coprocessor"
-EXTRA_OECMAKE += "-DCONF_FILE="prj.conf overlay-rcp.conf overlay-usb-nrf-br.conf" -DDTC_OVERLAY_FILE="usb.overlay""
+EXTRA_OECMAKE += "-DCONF_FILE="prj.conf overlay-rcp.conf overlay-usb-nrf-br.conf" -DDTC_OVERLAY_FILE="usb.overlay" -DCONFIG_OPENTHREAD_THREAD_VERSION_1_2=y"
# The overlay config and OpenThread itself imposes some specific requirements
# towards the boards (e.g. flash layout and ieee802154 radio) so we need to