diff --git a/src/engine/ContactManifold.h b/src/engine/ContactManifold.h
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+++ b/src/engine/ContactManifold.h
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+/********************************************************************************
+* ReactPhysics3D physics library, http://code.google.com/p/reactphysics3d/      *
+* Copyright (c) 2010-2012 Daniel Chappuis                                       *
+*********************************************************************************
+*                                                                               *
+* 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 CONTACT_MANIFOLD_H
+#define CONTACT_MANIFOLD_H
+
+// Libraries
+#include "../constraint/Contact.h"
+#include "../configuration.h"
+
+namespace reactphysics3d {
+
+// Class ContactManifold
+// This class contains several contact points between two bodies
+struct ContactManifold {
+
+        // -------------------- Attributes -------------------- //
+
+        // Contact for each contact point
+        Contact* contacts[4];         // TODO : Use a constant here for the nb of contacts
+
+        // Number of contacts in the manifold
+        uint nbContacts;
+
+        // -------------------- Methods -------------------- //
+
+        // Constructor
+        ContactManifold() : nbContacts(0) { }
+};
+
+}
+
+#endif