diff --git a/scripts/config.pl b/scripts/config.pl
index 5bf2785..a89787a 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -95,6 +95,7 @@
 MBEDTLS_ZLIB_SUPPORT
 MBEDTLS_PKCS11_C
 MBEDTLS_NO_UDBL_DIVISION
+MBEDTLS_NO_64BIT_MULTIPLICATION
 _ALT\s*$
 );