diff --git a/examples/openthread/ot_sleepy_device/sdkconfig.defaults b/examples/openthread/ot_sleepy_device/sdkconfig.defaults
index e9d3993e19..2279111544 100644
--- a/examples/openthread/ot_sleepy_device/sdkconfig.defaults
+++ b/examples/openthread/ot_sleepy_device/sdkconfig.defaults
@@ -9,6 +9,10 @@ CONFIG_PARTITION_TABLE_FILENAME="partitions.csv"
 #
 # mbedTLS
 #
+# TODO: Re-enable HW acceleration when HW AES support pm_lock (IDF-7704)
+CONFIG_MBEDTLS_HARDWARE_AES=n
+CONFIG_MBEDTLS_HARDWARE_MPI=n
+CONFIG_MBEDTLS_HARDWARE_SHA=n
 CONFIG_MBEDTLS_CMAC_C=y
 CONFIG_MBEDTLS_SSL_PROTO_DTLS=y
 CONFIG_MBEDTLS_KEY_EXCHANGE_ECJPAKE=y