diff --git a/Include/frameobject.h b/Include/frameobject.h
index dd36468..4d17267 100644
--- a/Include/frameobject.h
+++ b/Include/frameobject.h
@@ -1,6 +1,6 @@
 /***********************************************************
-Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The
-Netherlands.
+Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
+Amsterdam, The Netherlands.
 
                         All Rights Reserved