diff --git a/copyright.txt b/copyright.txt
index 597465ec5..3c0876951 100644
--- a/copyright.txt
+++ b/copyright.txt
@@ -8,6 +8,7 @@ Ewald Volkert
 Gunnar Morling
 Ivo Šmíd
 Michael Pardo
+Mustafa Caylak
 Paul Strugnell
 Remko Plantenga
 Sebastian Hasait