diff --git a/src/syzygy/tbprobe.cpp b/src/syzygy/tbprobe.cpp
index 485adf23..6aebf294 100644
--- a/src/syzygy/tbprobe.cpp
+++ b/src/syzygy/tbprobe.cpp
@@ -1,10 +1,20 @@
 /*
+  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
   Copyright (c) 2013 Ronald de Man
-  This file may be redistributed and/or modified without restrictions.
+  Copyright (C) 2016 Marco Costalba, Lucas Braesch
 
-  tbprobe.cpp contains the Stockfish-specific routines of the
-  tablebase probing code. It should be relatively easy to adapt
-  this code to other chess engines.
+  Stockfish is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Stockfish is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 #include <algorithm>
diff --git a/src/syzygy/tbprobe.h b/src/syzygy/tbprobe.h
index 9c3c3c01..f6ac57b1 100644
--- a/src/syzygy/tbprobe.h
+++ b/src/syzygy/tbprobe.h
@@ -1,3 +1,22 @@
+/*
+  Stockfish, a UCI chess playing engine derived from Glaurung 2.1
+  Copyright (c) 2013 Ronald de Man
+  Copyright (C) 2016 Marco Costalba, Lucas Braesch
+
+  Stockfish is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  Stockfish is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #ifndef TBPROBE_H
 #define TBPROBE_H