use compound init
diff --git a/lib/openssl.c b/lib/openssl.c
index dcb34ac..72f396d 100644
--- a/lib/openssl.c
+++ b/lib/openssl.c
@@ -1300,8 +1300,7 @@
int ptls_openssl_init_sign_certificate(ptls_openssl_sign_certificate_t *self, EVP_PKEY *key)
{
- *self = (ptls_openssl_sign_certificate_t){{sign_certificate}};
- self->async = 1;
+ *self = (ptls_openssl_sign_certificate_t){.super = {sign_certificate}, .async = 1};
if ((self->schemes = lookup_signature_schemes(key)) == NULL)
return PTLS_ERROR_INCOMPATIBLE_KEY;