diff --git a/lang/pc/libpc/trap.e b/lang/pc/libpc/trap.e
index 65895d9a9..ca6d3c570 100644
--- a/lang/pc/libpc/trap.e
+++ b/lang/pc/libpc/trap.e
@@ -1,6 +1,23 @@
 #
 
 ; $Header$
+;
+; (c) copyright 1983 by the Vrije Universiteit, Amsterdam, The Netherlands.
+;
+;          This product is part of the Amsterdam Compiler Kit.
+;
+; Permission to use, sell, duplicate or disclose this software must be
+; obtained in writing. Requests for such permissions may be sent to
+;
+;      Dr. Andrew S. Tanenbaum
+;      Wiskundig Seminarium
+;      Vrije Universiteit
+;      Postbox 7161
+;      1007 MC Amsterdam
+;      The Netherlands
+;
+;
+
  mes 2,EM_WSIZE,EM_PSIZE
 
 #define	TRAP	0