diff --git a/include/boost/asio/ssl/detail/openssl_types.hpp b/include/boost/asio/ssl/detail/openssl_types.hpp
index 38163bce..ca12943b 100644
--- a/include/boost/asio/ssl/detail/openssl_types.hpp
+++ b/include/boost/asio/ssl/detail/openssl_types.hpp
@@ -16,6 +16,7 @@
 #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
 
 #include <boost/asio/detail/config.hpp>
+#include <boost/asio/detail/socket_types.hpp>
 #include <openssl/conf.h>
 #include <openssl/ssl.h>
 #if !defined(OPENSSL_NO_ENGINE)
@@ -25,6 +26,5 @@
 #include <openssl/err.h>
 #include <openssl/rsa.h>
 #include <openssl/x509v3.h>
-#include <boost/asio/detail/socket_types.hpp>
 
 #endif // BOOST_ASIO_SSL_DETAIL_OPENSSL_TYPES_HPP