diff --git a/ports/nrf/drivers/bluetooth/ble_drv.c b/ports/nrf/drivers/bluetooth/ble_drv.c
index 59de7a9c0b..ab954a25a1 100644
--- a/ports/nrf/drivers/bluetooth/ble_drv.c
+++ b/ports/nrf/drivers/bluetooth/ble_drv.c
@@ -1071,8 +1071,8 @@ void SWI2_EGU2_IRQHandler(void) {
         sd_evt_handler(evt_id);
     }
 
-    uint16_t evt_len = sizeof(m_ble_evt_buf);
     while (1) {
+        uint16_t evt_len  = sizeof(m_ble_evt_buf);
         uint32_t err_code = sd_ble_evt_get(m_ble_evt_buf, &evt_len);
         if (err_code != NRF_SUCCESS) {
             // Possible error conditions: