diff --git a/Documentation/platforms/xtensa/esp32s3/index.rst b/Documentation/platforms/xtensa/esp32s3/index.rst
index 195c3e2b812..605e1d9afa3 100644
--- a/Documentation/platforms/xtensa/esp32s3/index.rst
+++ b/Documentation/platforms/xtensa/esp32s3/index.rst
@@ -324,8 +324,6 @@ Get or build QEMU from `here <https://github.com/espressif/qemu/wiki>`__. The mi
 
 Enable the ``ESP32S3_QEMU_IMAGE`` config found in :menuselection:`Board Selection --> ESP32S3 binary image for QEMU`.
 
-Enable ``ESP32S3_APP_FORMAT_LEGACY``.
-
 Build and generate the QEMU image::
 
  $ make bootloader
diff --git a/boards/xtensa/esp32s3/esp32s3-devkit/configs/qemu_openeth/defconfig b/boards/xtensa/esp32s3/esp32s3-devkit/configs/qemu_openeth/defconfig
index 43f06ce0331..735569ddcc2 100644
--- a/boards/xtensa/esp32s3/esp32s3-devkit/configs/qemu_openeth/defconfig
+++ b/boards/xtensa/esp32s3/esp32s3-devkit/configs/qemu_openeth/defconfig
@@ -20,7 +20,7 @@ CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARCH_XTENSA=y
 CONFIG_BOARD_LOOPSPERMSEC=16717
 CONFIG_BUILTIN=y
-CONFIG_ESP32S3_APP_FORMAT_LEGACY=y
+CONFIG_ESP32S3_APP_FORMAT_MCUBOOT=y
 CONFIG_ESP32S3_OPENETH=y
 CONFIG_ESP32S3_QEMU_IMAGE=y
 CONFIG_ESP32S3_UART0=y