diff --git a/docs/en/api-guides/performance/size.rst b/docs/en/api-guides/performance/size.rst
index fd6a6252ef..980a99a56a 100644
--- a/docs/en/api-guides/performance/size.rst
+++ b/docs/en/api-guides/performance/size.rst
@@ -419,6 +419,7 @@ These include:
 - :ref:`CONFIG_MBEDTLS_ECP_FIXED_POINT_OPTIM`
 - Change :ref:`CONFIG_MBEDTLS_TLS_MODE` if both server & client functionalities are not needed
 - Consider disabling some ciphersuites listed in the "TLS Key Exchange Methods" sub-menu (i.e. :ref:`CONFIG_MBEDTLS_KEY_EXCHANGE_RSA`)
+- Consider disabling :ref:`CONFIG_MBEDTLS_ERROR_STRINGS` if the application is pulling in mbedTLS error strings because of :cpp:func:`mbedtls_strerror` usage
 
 The help text for each option has some more information.