diff --git a/examples/device/dfu_freertos/sdkconfig.defaults b/examples/device/dfu_freertos/sdkconfig.defaults
index 112e8b392..fec9325b0 100644
--- a/examples/device/dfu_freertos/sdkconfig.defaults
+++ b/examples/device/dfu_freertos/sdkconfig.defaults
@@ -20,3 +20,9 @@ CONFIG_PARTITION_TABLE_FILENAME="partitions.csv"
 #
 CONFIG_ESP_CONSOLE_UART_NONE=y
 CONFIG_CONSOLE_UART_NUM=-1
+
+#
+# CPU frequency
+#
+CONFIG_ESP32S2_DEFAULT_CPU_FREQ_240=y
+CONFIG_ESP32S2_DEFAULT_CPU_FREQ_MHZ=240