diff --git a/third_party/NordicSemiconductor/drivers/radio/raal/softdevice/nrf_raal_softdevice.c b/third_party/NordicSemiconductor/drivers/radio/raal/softdevice/nrf_raal_softdevice.c
index 0a6467f87..07854641c 100644
--- a/third_party/NordicSemiconductor/drivers/radio/raal/softdevice/nrf_raal_softdevice.c
+++ b/third_party/NordicSemiconductor/drivers/radio/raal/softdevice/nrf_raal_softdevice.c
@@ -327,12 +327,14 @@ static void timeslot_request(void)
 {
     timeslot_request_prepare();
 
+    m_timeslot_state = TIMESLOT_STATE_REQUESTED;
+
     // Request timeslot from SoftDevice.
     uint32_t err_code = sd_radio_request(&m_request);
 
-    if (err_code == NRF_SUCCESS)
+    if (err_code != NRF_SUCCESS)
     {
-        m_timeslot_state = TIMESLOT_STATE_REQUESTED;
+        m_timeslot_state = TIMESLOT_STATE_IDLE;
     }
 
     nrf_802154_log(EVENT_TIMESLOT_REQUEST, m_request.params.earliest.length_us);