diff --git a/include/soundcache.hpp b/include/soundcache.hpp
index cf40b55b..6b606217 100644
--- a/include/soundcache.hpp
+++ b/include/soundcache.hpp
@@ -1,3 +1,4 @@
+#pragma once
 #include "common.hpp"
 struct CSndInfo_t
 {