diff --git a/scripts/config.pl b/scripts/config.pl
index 42ec6f8..d5c2ed8 100755
--- a/scripts/config.pl
+++ b/scripts/config.pl
@@ -98,6 +98,7 @@
 MBEDTLS_PKCS11_C
 MBEDTLS_NO_UDBL_DIVISION
 MBEDTLS_NO_64BIT_MULTIPLICATION
+MBEDTLS_USE_UECC
 _ALT\s*$
 );