1 files changed, 1 insertions, 1 deletions

diff --git a/src/interface.h b/src/interface.h
index 4103f93..bc4bd06 100644
--- a/src/interface.h
+++ b/src/interface.h
@@ -7,7 +7,7 @@ public:
         Interface();
         virtual ~Interface();
 
-        void display();
+        virtual void display( const class SmlNode *pSml )=0;
 };
 
 #endif