diff --git a/compat/aix/math.h b/compat/aix/math.h
index e1d1417c82..65a89c4565 100644
--- a/compat/aix/math.h
+++ b/compat/aix/math.h
@@ -1,5 +1,23 @@
-/* Work around the class() function in AIX math.h clashing with identifiers
- * named "class". */
+/*
+ * Work around the class() function in AIX math.h clashing with
+ * identifiers named "class".
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
 
 #ifndef FFMPEG_COMPAT_AIX_MATH_H
 #define FFMPEG_COMPAT_AIX_MATH_H
diff --git a/compat/tms470/math.h b/compat/tms470/math.h
index ad531297a1..6234cc597b 100644
--- a/compat/tms470/math.h
+++ b/compat/tms470/math.h
@@ -1,3 +1,21 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
 #ifndef FFMPEG_COMPAT_TMS470_MATH_H
 #define FFMPEG_COMPAT_TMS470_MATH_H