diff --git a/scripts/config.pl b/scripts/config.pl
index 42ec6f81b..d5c2ed88c 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -98,6 +98,7 @@ MBEDTLS_ZLIB_SUPPORT
 MBEDTLS_PKCS11_C
 MBEDTLS_NO_UDBL_DIVISION
 MBEDTLS_NO_64BIT_MULTIPLICATION
+MBEDTLS_USE_UECC
 _ALT\s*$
 );