diff --git a/include/date.h b/include/date.h
index aab6e65d3..4459882d3 100755
--- a/include/date.h
+++ b/include/date.h
@@ -12,7 +12,7 @@
 #define TODAY  -1
 #define ANSI   -1
 
-class TDate : TObject
+class TDate : public TObject
 {
   // @DPRIV
   long    _val; // Valore data in formato packed