diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 719bbed..a086bfe 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -4006,4 +4006,9 @@
  */
 //#define MBEDTLS_ECP_WITH_MPI_UINT
 
+/*
+ * Platform independent implementation for crypto algorithms.
+ */
+//#define MBEDTLS_AES_HAS_NO_BUILTIN /* Uncomment to disable built-in platform independent code of AES */
+
 /** \} name SECTION: Module configuration options */