diff --git a/lib/decoding/osmocom/coding/gsm0503_coding.h b/lib/decoding/osmocom/coding/gsm0503_coding.h
index 83cdbd5..5e3e9db 100644
--- a/lib/decoding/osmocom/coding/gsm0503_coding.h
+++ b/lib/decoding/osmocom/coding/gsm0503_coding.h
@@ -1,3 +1,25 @@
+/*
+ * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
+ * (C) 2015 by Alexander Chemeris <Alexander.Chemeris@fairwaves.co>
+ * (C) 2016 by Tom Tsou <tom.tsou@ettus.com>
+ *
+ * All Rights Reserved
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
 #pragma once
 
 #include <stdint.h>
diff --git a/lib/decoding/osmocom/coding/gsm0503_conv.c b/lib/decoding/osmocom/coding/gsm0503_conv.c
index f275ea4..5ab63a6 100644
--- a/lib/decoding/osmocom/coding/gsm0503_conv.c
+++ b/lib/decoding/osmocom/coding/gsm0503_conv.c
@@ -1,4 +1,3 @@
-
 /*
  * Copyright (C) 2011-2016 Sylvain Munaut <tnt@246tNt.com>
  * Copyright (C) 2016 sysmocom s.f.m.c. GmbH
diff --git a/lib/decoding/osmocom/coding/gsm0503_interleaving.h b/lib/decoding/osmocom/coding/gsm0503_interleaving.h
index f97dff4..05c0365 100644
--- a/lib/decoding/osmocom/coding/gsm0503_interleaving.h
+++ b/lib/decoding/osmocom/coding/gsm0503_interleaving.h
@@ -1,3 +1,25 @@
+/*
+ * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
+ * (C) 2016 by Tom Tsou <tom.tsou@ettus.com>
+ *
+ * All Rights Reserved
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+
 #pragma once
 
 #include <osmocom/core/bits.h>
diff --git a/lib/decoding/osmocom/coding/gsm0503_mapping.h b/lib/decoding/osmocom/coding/gsm0503_mapping.h
index 4c6550a..417a94f 100644
--- a/lib/decoding/osmocom/coding/gsm0503_mapping.h
+++ b/lib/decoding/osmocom/coding/gsm0503_mapping.h
@@ -1,3 +1,24 @@
+/*
+ * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
+ * (C) 2016 by Tom Tsou <tom.tsou@ettus.com>
+ *
+ * All Rights Reserved
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+ 
 #pragma once
 
 #include <osmocom/core/bits.h>
diff --git a/lib/decoding/osmocom/coding/gsm0503_parity.h b/lib/decoding/osmocom/coding/gsm0503_parity.h
index 540124a..6d8a062 100644
--- a/lib/decoding/osmocom/coding/gsm0503_parity.h
+++ b/lib/decoding/osmocom/coding/gsm0503_parity.h
@@ -1,3 +1,24 @@
+/*
+ * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
+ * (C) 2016 by Tom Tsou <tom.tsou@ettus.com>
+ *
+ * All Rights Reserved
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+ 
 #pragma once
 
 #include <osmocom/core/crcgen.h>
diff --git a/lib/decoding/osmocom/coding/gsm0503_tables.h b/lib/decoding/osmocom/coding/gsm0503_tables.h
index e6761ca..4976c81 100644
--- a/lib/decoding/osmocom/coding/gsm0503_tables.h
+++ b/lib/decoding/osmocom/coding/gsm0503_tables.h
@@ -1,3 +1,24 @@
+/*
+ * (C) 2013 by Andreas Eversberg <jolly@eversberg.eu>
+ * (C) 2016 by Tom Tsou <tom.tsou@ettus.com>
+ *
+ * All Rights Reserved
+ *
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
 #pragma once
 
 #include <stdint.h>