diff --git a/sample/engine_test.c b/sample/engine_test.c
index d63926c..1adf01f 100755
--- a/sample/engine_test.c
+++ b/sample/engine_test.c
@@ -101,7 +101,7 @@ int main(int argc, char **argv) {
         printf("connected\n");
     }
 
-    engine->set_io_fd(engine, sock);
+    engine->set_io_fd(engine, (uv_os_sock_t)sock);
 
     // do handshake
     do {
diff --git a/src/openssl/engine.c b/src/openssl/engine.c
index eb52ea6..f6342f2 100644
--- a/src/openssl/engine.c
+++ b/src/openssl/engine.c
@@ -578,13 +578,6 @@ tlsuv_engine_t new_openssl_engine(void *ctx, const char *host) {
     engine->api = openssl_engine_api;
 
     engine->ssl = SSL_new(context->ctx);
-//    engine->in = BIO_new(BIO_s_mem());
-//    engine->out = BIO_new(BIO_s_mem());
-//
-//    BIO *engine_bio = BIO_new(BIO_s_engine());
-//    BIO_set_data(engine_bio, engine);
-//    BIO_set_init(engine_bio, 1);
-//    SSL_set_bio(engine->ssl, engine_bio, engine_bio);
 
     SSL_set_tlsext_host_name(engine->ssl, host);
     SSL_set1_host(engine->ssl, host);
@@ -613,7 +606,7 @@ static void set_io_fd(tlsuv_engine_t self, uv_os_fd_t fd) {
     struct openssl_engine *e = (struct openssl_engine *) self;
     assert(e->bio == NULL);
 
-    e->bio = BIO_new_fd(fd, false);
+    e->bio = BIO_new_socket(fd, false);
     SSL_set_bio(e->ssl, e->bio, e->bio);
 }
 
diff --git a/tests/engine_tests.cpp b/tests/engine_tests.cpp
index e885923..c3d1df3 100644
--- a/tests/engine_tests.cpp
+++ b/tests/engine_tests.cpp
@@ -202,7 +202,7 @@ TEST_CASE("ALPN negotiation", "[engine]") {
         perror("failed to conenct");
     }
 
-    engine->set_io_fd(engine, sock);
+    engine->set_io_fd(engine, (uv_os_sock_t)sock);
 
     // do handshake
     do {