diff --git a/COPYRIGHT b/COPYRIGHT
index 65472c820a8d4a2427fc77720c2b80113a4b17f7..143d2c1fece632d0790aa8fb730759fdd668a28f 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -15,6 +15,9 @@ with their respective conditions for distribution.
 DES encryption and decryption code
 Copyright � 1992 Dana L. How
 
+The Independent JPEG Group's JPEG software
+Copyright � 1991-1998, Thomas G. Lane
+
 Regular expression matching code
 Copyright � 1986 by University of Toronto.