diff --git a/lighthub/abstractout.h b/lighthub/abstractout.h
index 22a0bb1..1453e73 100644
--- a/lighthub/abstractout.h
+++ b/lighthub/abstractout.h
@@ -1,10 +1,10 @@
 #pragma once
 #include "Arduino.h"
 
-class Input;
-class abstractOut {
+
+class abstractOut  : public abstractCh{
 public:
-    abstractOut(Input * _in){in=_in;};
+    abstractOut(Input * _in):abstractCh(){in=_in;};
     virtual int Setup(int addr) = 0;
     virtual int Poll() = 0;
 protected: