diff --git a/php_memcached_session.h b/php_memcached_session.h
index cace188d..97fe2005 100644
--- a/php_memcached_session.h
+++ b/php_memcached_session.h
@@ -32,3 +32,5 @@ PS_READ_FUNC(memcached);
 PS_WRITE_FUNC(memcached);
 PS_DESTROY_FUNC(memcached);
 PS_GC_FUNC(memcached);
+
+#endif /* PHP_MEMCACHED_SESSION_H */