diff --git a/common/aloptional.h b/common/aloptional.h
index e48711f2..a33c4a65 100644
--- a/common/aloptional.h
+++ b/common/aloptional.h
@@ -131,4 +131,4 @@ inline optional<T> make_optional(std::initializer_list<U> il, Args&& ...args)
 
 } // namespace al
 
-#endif /* AL_SPAN_H */
+#endif /* AL_OPTIONAL_H */