diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index b2a9a2e..c47c471 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1174,6 +1174,16 @@
 //#define MBEDTLS_PSA_CRYPTO_SPM
 
 /**
+ * \def MBEDTLS_PSA_HAS_ITS_IO
+ *
+ * Enable the non-volatile secure storage usage.
+ *
+ * This is crucial on systems that do not have a HW TRNG support.
+ *
+ */
+//#define MBEDTLS_PSA_HAS_ITS_IO
+
+/**
  * \def MBEDTLS_RSA_NO_CRT
  *
  * Do not use the Chinese Remainder Theorem