diff --git a/DOCUMENTATION/CONTRIBUTORS b/DOCUMENTATION/CONTRIBUTORS
index 6e6fa2697a..d4b3f441c0 100644
--- a/DOCUMENTATION/CONTRIBUTORS
+++ b/DOCUMENTATION/CONTRIBUTORS
@@ -23,6 +23,7 @@ Joshua Pritikin
 Rohan Drape
 Johan De Groote
 Bob Ham
+Petter Sundlöf
 
 I would particularly like to recognize:
 
diff --git a/gtk2_ardour/about.cc b/gtk2_ardour/about.cc
index 573357d1e3..500242ae59 100644
--- a/gtk2_ardour/about.cc
+++ b/gtk2_ardour/about.cc
@@ -137,6 +137,7 @@ static const char* authors[] = {
 	N_("Rob Holland"),
 	N_("Per Sigmond"),
 	N_("Doug Mclain"),
+	N_("Petter Sundlöf"),
 	0
 };