diff --git a/scripts/config.pl b/scripts/config.pl
index ab4322bab..e18402a30 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -26,6 +26,8 @@
 #   MBEDTLS_ECP_DP_M221_ENABLED
 #   MBEDTLS_ECP_DP_M383_ENABLED
 #   MBEDTLS_ECP_DP_M511_ENABLED
+#   MBEDTLS_MEMORY_BACKTRACE
+#   MBEDTLS_MEMORY_BUFFER_ALLOC_C
 #   MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
 #   MBEDTLS_NO_PLATFORM_ENTROPY
 #   MBEDTLS_REMOVE_ARC4_CIPHERSUITES
@@ -86,6 +88,8 @@ MBEDTLS_PLATFORM_NO_STD_FUNCTIONS
 MBEDTLS_ECP_DP_M221_ENABLED
 MBEDTLS_ECP_DP_M383_ENABLED
 MBEDTLS_ECP_DP_M511_ENABLED
+MBEDTLS_MEMORY_BACKTRACE
+MBEDTLS_MEMORY_BUFFER_ALLOC_C
 MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES
 MBEDTLS_NO_PLATFORM_ENTROPY
 MBEDTLS_RSA_NO_CRT