diff --git a/base/cache.hpp b/base/cache.hpp
index 9b50f14e25..eb695c9af7 100644
--- a/base/cache.hpp
+++ b/base/cache.hpp
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "base/assert.hpp"
 #include "base/base.hpp"
 #include "base/macros.hpp"