diff --git a/lang/cem/cemcom/nmclash.c b/lang/cem/cemcom/nmclash.c
index 95a9489e..e820442d 100644
--- a/lang/cem/cemcom/nmclash.c
+++ b/lang/cem/cemcom/nmclash.c
@@ -1,3 +1,7 @@
+/*
+ * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
+ * See the copyright notice in the ACK home directory, in the file "Copyright".
+ */
 /* Accepted if many characters of long names are significant */
 /* $Header$ */
 abcdefghijklmnopr() { }