diff --git a/code/cpp/observer.h b/code/cpp/observer.h
index 9d94bab3..96644bf7 100644
--- a/code/cpp/observer.h
+++ b/code/cpp/observer.h
@@ -210,6 +210,8 @@ namespace ObserverPattern
     //^linked-subject
     class Subject
     {
+      
+    public:
       Subject()
       : head_(NULL)
       {}