diff --git a/components/bt/common/ble_log/src/ble_log_lbm.c b/components/bt/common/ble_log/src/ble_log_lbm.c
index 5078f2bad7..9b8626d1ad 100644
--- a/components/bt/common/ble_log/src/ble_log_lbm.c
+++ b/components/bt/common/ble_log/src/ble_log_lbm.c
@@ -421,6 +421,7 @@ deref:
     BLE_LOG_REF_COUNT_RELEASE(&lbm_ref_count);
 }
 
+BLE_LOG_IRAM_ATTR
 bool ble_log_write_hex(ble_log_src_t src_code, const uint8_t *addr, size_t len)
 {
     BLE_LOG_REF_COUNT_ACQUIRE(&lbm_ref_count);