diff --git a/examples/bluetooth/a2dp_gatts_coex/sdkconfig.defaults b/examples/bluetooth/a2dp_gatts_coex/sdkconfig.defaults
index 07275e1e7..ab17432ac 100644
--- a/examples/bluetooth/a2dp_gatts_coex/sdkconfig.defaults
+++ b/examples/bluetooth/a2dp_gatts_coex/sdkconfig.defaults
@@ -1,6 +1,9 @@
 # Override some defaults so BT stack is enabled and
 # Classic BT is enabled and BT_DRAM_RELEASE is disabled
 CONFIG_BT_ENABLED=y
+CONFIG_BTDM_CONTROLLER_MODE_BLE_ONLY=
+CONFIG_BTDM_CONTROLLER_MODE_BR_EDR_ONLY=
+CONFIG_BTDM_CONTROLLER_MODE_BTDM=y
 CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE_0=y
 CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE_1=
 CONFIG_BTDM_CONTROLLER_PINNED_TO_CORE=0
@@ -27,4 +30,3 @@ CONFIG_BT_ACL_CONNECTIONS=4
 CONFIG_BT_ALLOCATION_FROM_SPIRAM_FIRST=
 CONFIG_BT_BLE_DYNAMIC_ENV_MEMORY=
 CONFIG_SMP_ENABLE=y
-CONFIG_BT_RESERVE_DRAM=0x10000
diff --git a/examples/bluetooth/blufi/sdkconfig.defaults b/examples/bluetooth/blufi/sdkconfig.defaults
index f5f005c45..9f442b20c 100644
--- a/examples/bluetooth/blufi/sdkconfig.defaults
+++ b/examples/bluetooth/blufi/sdkconfig.defaults
@@ -29,4 +29,3 @@ CONFIG_BT_ACL_CONNECTIONS=4
 CONFIG_BT_ALLOCATION_FROM_SPIRAM_FIRST=
 CONFIG_BT_BLE_DYNAMIC_ENV_MEMORY=
 CONFIG_SMP_ENABLE=
-CONFIG_BT_RESERVE_DRAM=0x10000