diff --git a/scripts/config.pl b/scripts/config.pl
index 308af4a..e4648de 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -40,6 +40,7 @@
 #       - this could be enabled if the respective tests were adapted
 #   MBEDTLS_X509_REMOVE_INFO
 #   MBEDTLS_X509_CRT_REMOVE_TIME
+#   MBEDTLS_X509_CRT_REMOVE_SUBJECT_ISSUER_ID
 #   MBEDTLS_ZLIB_SUPPORT
 #   MBEDTLS_PKCS11_C
 #   and any symbol beginning _ALT
@@ -104,6 +105,7 @@
 MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION
 MBEDTLS_X509_REMOVE_INFO
 MBEDTLS_X509_CRT_REMOVE_TIME
+MBEDTLS_X509_CRT_REMOVE_SUBJECT_ISSUER_ID
 MBEDTLS_ZLIB_SUPPORT
 MBEDTLS_PKCS11_C
 MBEDTLS_NO_UDBL_DIVISION