diff --git a/winixd/core/system.h b/winixd/core/system.h
index b293c43..3e9aedd 100644
--- a/winixd/core/system.h
+++ b/winixd/core/system.h
@@ -64,7 +64,7 @@ class SessionManager;
 
 
 // file system
-class System : WinixModelDeprecated
+class System : public WinixModelDeprecated
 {
 public: