diff --git a/Modules/_hashopenssl.c b/Modules/_hashopenssl.c
index a41c97e..2c8a18f 100644
--- a/Modules/_hashopenssl.c
+++ b/Modules/_hashopenssl.c
@@ -984,6 +984,7 @@ init_hashlib(void)
     SSL_load_error_strings();
     SSL_library_init();
     ERR_load_crypto_strings();
+    OpenSSL_add_all_digests();
 
     Py_TYPE(&EVPtype) = &PyType_Type;
     if (PyType_Ready(&EVPtype) < 0)