diff --git a/alib2std/src/extensions/random.hpp b/alib2std/src/extensions/random.hpp
index 16939d5dca69f1e1ceea177639e2d196bc8d8fe2..d45b470b5facfde5a843b3cf5c46b525763673cb 100644
--- a/alib2std/src/extensions/random.hpp
+++ b/alib2std/src/extensions/random.hpp
@@ -53,4 +53,4 @@ public:
 
 } /* namespace std */
 
-#endif /* _RANDOM_HPP_ */
+#endif /* __RANDOM_HPP_ */