diff --git a/demo/object/bi.c b/demo/object/bi.c
index 72b3ca3..f7219b9 100644
--- a/demo/object/bi.c
+++ b/demo/object/bi.c
@@ -1281,7 +1281,7 @@ bool Binary_Input_Write_Property(
     if (Binary_Input_Valid_Instance(wp_data->object_instance)) {
         index = Binary_Input_Instance_To_Index(wp_data->object_instance);
         CurrentBI = &BI_Descr[index];
-        sprintf(idx_cc,"%d",index);
+        sprintf(idx_cc,"%d",CurrentBI->Instance);
         idx_c = idx_cc;
     } else
         return false;