diff --git a/THANKS b/THANKS
index 77d35ee40..93bdae48e 100644
--- a/THANKS
+++ b/THANKS
@@ -178,6 +178,7 @@ Olav Morkrid                        olav@funcom.com
 Paul Eggert                         eggert@twinsun.com
 Paul Nevai                          nevai@ops.mps.ohio-state.edu
 Paul Slootman                       paul@debian.org
+Per Cederqvist                      ceder@lysator.liu.se
 Per Kristian Hove                   perhov@math.ntnu.no
 Peter Eriksson                      peter@ifm.liu.se
 Peter Moulder                       reiter@netspace.net.au