diff --git a/sources/reactphysics3d/engine/PhysicsWorld.h b/sources/reactphysics3d/engine/PhysicsWorld.h
index bc1537e9..1886936c 100644
--- a/sources/reactphysics3d/engine/PhysicsWorld.h
+++ b/sources/reactphysics3d/engine/PhysicsWorld.h
@@ -17,8 +17,8 @@
  * along with ReactPhysics3D. If not, see <http://www.gnu.org/licenses/>.   *
  ***************************************************************************/
 
-#ifndef WORLD_H
-#define WORLD_H
+#ifndef PHYSICSWORLD_H
+#define PHYSICSWORLD_H
 
 // Libraries
 #include <vector>