diff --git a/Extras/Serialize/makesdna/DNA_rigidbody.h b/Extras/Serialize/makesdna/DNA_rigidbody.h
index d100dab18..7835a25d1 100644
--- a/Extras/Serialize/makesdna/DNA_rigidbody.h
+++ b/Extras/Serialize/makesdna/DNA_rigidbody.h
@@ -1,3 +1,17 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+http://bulletphysics.org
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it freely,
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
 
 #ifndef DNA_RIGIDBODY_H
 #define DNA_RIGIDBODY_H