diff --git a/src/xz/args.c b/src/xz/args.c
index 7af3e850..8b943530 100644
--- a/src/xz/args.c
+++ b/src/xz/args.c
@@ -5,7 +5,8 @@
 ///
 /// \note       Filter-specific options parsing is in options.c.
 //
-//  Author:     Lasse Collin
+//  Authors:    Lasse Collin
+//              Jia Tan
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.
diff --git a/src/xz/args.h b/src/xz/args.h
index a1a5930a..a1f42f8a 100644
--- a/src/xz/args.h
+++ b/src/xz/args.h
@@ -3,7 +3,8 @@
 /// \file       args.h
 /// \brief      Argument parsing
 //
-//  Author:     Lasse Collin
+//  Authors:    Lasse Collin
+//              Jia Tan
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.
diff --git a/src/xz/coder.c b/src/xz/coder.c
index ab2b07d3..3fefded9 100644
--- a/src/xz/coder.c
+++ b/src/xz/coder.c
@@ -3,7 +3,8 @@
 /// \file       coder.c
 /// \brief      Compresses or uncompresses a file
 //
-//  Author:     Lasse Collin
+//  Authors:    Lasse Collin
+//              Jia Tan
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.
diff --git a/src/xz/coder.h b/src/xz/coder.h
index 7a255939..7dfa466e 100644
--- a/src/xz/coder.h
+++ b/src/xz/coder.h
@@ -3,7 +3,8 @@
 /// \file       coder.h
 /// \brief      Compresses or uncompresses a file
 //
-//  Author:     Lasse Collin
+//  Authors:    Lasse Collin
+//              Jia Tan
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.
diff --git a/src/xz/message.c b/src/xz/message.c
index a888d29e..8caba650 100644
--- a/src/xz/message.c
+++ b/src/xz/message.c
@@ -3,7 +3,8 @@
 /// \file       message.c
 /// \brief      Printing messages
 //
-//  Author:     Lasse Collin
+//  Authors:    Lasse Collin
+//              Jia Tan
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.