diff --git a/scripts/config.pl b/scripts/config.pl
index f3b9da6..d9aef53 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -62,6 +62,7 @@
 #   MBEDTLS_OPTIMIZE_TINYCRYPT_ASM
 #   MBEDTLS_AES_128_BIT_MASKED
 #   MBEDTLS_PLATFORM_FAULT_CALLBACKS
+#   MBEDTLS_DELAYED_SERVER_CERT_VERIFICATION
 #   MBEDTLS_SSL_FREE_SERVER_CERTIFICATE
 #   MBEDTLS_IMMEDIATE_TRANSMISSION
 #   MBEDTLS_EARLY_KEY_COMPUTATION
@@ -153,6 +154,7 @@
 MBEDTLS_OPTIMIZE_TINYCRYPT_ASM
 MBEDTLS_AES_128_BIT_MASKED
 MBEDTLS_PLATFORM_FAULT_CALLBACKS
+MBEDTLS_DELAYED_SERVER_CERT_VERIFICATION
 MBEDTLS_SSL_FREE_SERVER_CERTIFICATE
 MBEDTLS_IMMEDIATE_TRANSMISSION
 MBEDTLS_EARLY_KEY_COMPUTATION