diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index c47c4714a..c1619fbad 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -1103,6 +1103,16 @@
  */
 //#define MBEDTLS_ENTROPY_NV_SEED
 
+/**
+ * \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_MEMORY_DEBUG
  *