diff --git a/components/bt/host/bluedroid/bta/include/bta/utl.h b/components/bt/host/bluedroid/bta/include/bta/utl.h
index a140832f3227..f2a376a90a7c 100644
--- a/components/bt/host/bluedroid/bta/include/bta/utl.h
+++ b/components/bt/host/bluedroid/bta/include/bta/utl.h
@@ -43,6 +43,7 @@
 
 /** for utl_set_device_class() **/
 typedef struct {
+    UINT8       reserved_2;
     UINT8       minor;
     UINT8       major;
     UINT16      service;
diff --git a/components/bt/host/bluedroid/btc/profile/std/gap/btc_gap_bt.c b/components/bt/host/bluedroid/btc/profile/std/gap/btc_gap_bt.c
index 9e9d7b015cdb..c059d852668f 100644
--- a/components/bt/host/bluedroid/btc/profile/std/gap/btc_gap_bt.c
+++ b/components/bt/host/bluedroid/btc/profile/std/gap/btc_gap_bt.c
@@ -585,6 +585,7 @@ static void btc_gap_bt_set_cod(btc_gap_bt_args_t *arg)
 {
     tBTA_UTL_COD p_cod;
     esp_bt_cod_t *cod = &(arg->set_cod.cod);
+    p_cod.reserved_2 = cod->reserved_2;
     p_cod.minor = cod->minor << 2;
     p_cod.major = cod->major;
     p_cod.service = cod->service << 5;
@@ -605,6 +606,7 @@ esp_err_t btc_gap_bt_get_cod(esp_bt_cod_t *cod)
     cod->minor = p_cod.minor >> 2;
     cod->major = p_cod.major;
     cod->service = p_cod.service >> 5;
+    cod->reserved_2 = p_cod.reserved_2;
     return ESP_BT_STATUS_SUCCESS;
 }