diff --git a/include/libtorrent/gzip.hpp b/include/libtorrent/gzip.hpp
index 0528b58f2..2db984c2e 100644
--- a/include/libtorrent/gzip.hpp
+++ b/include/libtorrent/gzip.hpp
@@ -30,6 +30,13 @@ POSSIBILITY OF SUCH DAMAGE.
 
 */
 
+#ifndef TORRENT_GZIP_HPP_INCLUDED
+#define TORRENT_GZIP_HPP_INCLUDED
+
+#include "libtorrent/config.hpp"
+#include <string>
+#include <vector>
+
 namespace libtorrent
 {
 
@@ -41,3 +48,5 @@ namespace libtorrent
 
 }
 
+#endif
+