+#if OPENSSL_VERSION_NUMBER >= 0x30000000L
+#include <openssl/provider.h>
+
+#define quic_load_openssl3_legacy_provider() \
+ do \
+ { \
+ (void) OSSL_PROVIDER_load (NULL, "legacy"); \
+ } \
+ while (0)
+#else
+#define quic_load_openssl3_legacy_provider()
+#endif
+