1 files changed, 1 insertions, 1 deletions
diff --git a/build/variable b/build/variable
index 0972f3c..0cd411d 100644
--- a/build/variable
+++ b/build/variable
@@ -64,7 +64,7 @@ namespace build
     ~value () = default;
   };
 
-  struct list_value: value, names
+  class list_value: public value, public names
   {
   public:
     using names::names;