diff --git a/sol/forward.hpp b/sol/forward.hpp
index b3b82b79..a72575c6 100644
--- a/sol/forward.hpp
+++ b/sol/forward.hpp
@@ -95,4 +95,4 @@ namespace sol {
 
 } // sol
 
-#endif SOL_FORWARD_HPP
+#endif // SOL_FORWARD_HPP
diff --git a/sol/variadic_results.hpp b/sol/variadic_results.hpp
index 7fe3a3d3..a4f7fb96 100644
--- a/sol/variadic_results.hpp
+++ b/sol/variadic_results.hpp
@@ -48,4 +48,4 @@ namespace sol {
 
 } // sol
 
-#endif SOL_VARIADIC_RESULTS_HPP
+#endif // SOL_VARIADIC_RESULTS_HPP