diff --git a/lib/python/pyvcp_widgets.py b/lib/python/pyvcp_widgets.py
index acf190d..c2b97b5 100644
--- a/lib/python/pyvcp_widgets.py
+++ b/lib/python/pyvcp_widgets.py
@@ -589,6 +589,10 @@ class pyvcp_radiobutton(Frame):
             self.halpins.append(c_halpin)
             n+=1

+
+        self.indexpin=halpin+".index"
+        pycomp.newpin(self.indexpin, HAL_U32, HAL_OUT)
+
     # FIXME
     # this is a fairly stupid way of updating the pins
     # since the calculation is done every 100ms wether a change
@@ -599,6 +603,7 @@ class pyvcp_radiobutton(Frame):
         for pin in self.halpins:
             pycomp[pin]=0;
         pycomp[self.halpins[index]]=1;
+        pycomp[self.indexpin] = index

     # FIXME
     # this would be a much better way of updating the