diff --git a/contributors_extra.csv b/contributors_extra.csv
index 35471d22216..afcde8b85a1 100644
--- a/contributors_extra.csv
+++ b/contributors_extra.csv
@@ -10,6 +10,7 @@ Bruce Byars,<Bruce_Byars baylor.edu>,-,-
 Carl Anderson,<candrsn mindspring.com>,-,-
 Charles Ehlschlaeger,<cre111 wiu.edu>,-,-
 Christoph Simon,<ciccio kiosknet.com.br>,-,-
+David Knapp,-,USA,-
 Duccio Rocchini,<ducciorocchini gmail.com>,Italy,-
 Dylan Beaudette,<dylan.beaudette gmail.com>,-,yes
 Eric Mitchell,<emitchell altaira.com>,-,-
@@ -21,7 +22,6 @@ Job Spijker,<spijker geo.uu.nl>,-,-
 Lars Ahlzen,<lars ahlzen.com>,-,-
 Lorenzo Moretti,<lorenzo moretti bologna.enea.it>,Italy,-
 Lubos Mitas,<lmitas ncsa uiuc.edu>,-,-
-Luca Delucchi,<lucadeluge gmail.com>,Italy,-
 Malcolm Blue,<mblue nb sympatico.ca>,Canada,-
 Maria Brovelli,<maria.brovelli polimi.it>,Italy,-
 Michael Perdue,<michael_perdue yahoo.ca>,-,-