diff --git a/Include/intrcheck.h b/Include/intrcheck.h
index 7f1b526..2914a6a 100644
--- a/Include/intrcheck.h
+++ b/Include/intrcheck.h
@@ -5,7 +5,7 @@
 #endif
 
 /***********************************************************
-Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
+Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
 Amsterdam, The Netherlands.
 
                         All Rights Reserved