https://devzone.nordicsemi.com/f/nordic-q-a/126851/wake-up-from-system-off-with-rtcHello community I have tested the v3.2.1\zephyr\samples\boards\nordic\system_off example and it works fine on my nrf54l15dk. Now i wanted to use parts of it for my custom board and i found out that the example uses the kernel function to setupen-USTelligent Community 13Thu, 05 Feb 2026 12:17:59 GMThttps://devzone.nordicsemi.com/thread/560439?ContentTypeID=1Thu, 05 Feb 2026 12:17:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2d10f553-68bd-40bd-8278-c68b28c0f886Simonr<p>Hi Michael</p> <p>You are right, and it seems like the <strong>nrf_grtc_timer</strong>&nbsp;driver has used this <strong>z_</strong> prefix without heeding this. It should be fine to use since it&#39;s not an internal Zephyr function, but I will create an internal ticket to fix this in future NCS versions.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>