diff --git a/difftime.c b/difftime.c
index f8c6ac2..95fb65c 100644
--- a/difftime.c
+++ b/difftime.c
@@ -1,6 +1,6 @@
 /*
 ** This file is in the public domain, so clarified as of
-** 1996-06-05 by Arthur David Olson (arthur_david_olson@nih.gov).
+** 1996-06-05 by Arthur David Olson.
 */
 
 #ifndef lint