diff --git a/include/Nazara/Physics/Geom.hpp b/include/Nazara/Physics/Geom.hpp
index ba3500513..511b7019d 100644
--- a/include/Nazara/Physics/Geom.hpp
+++ b/include/Nazara/Physics/Geom.hpp
@@ -218,6 +218,8 @@ class NAZARA_PHYSICS_API NzNullGeom : public NzPhysGeom
 	public:
 		NzNullGeom();
 
+		void ComputeInertialMatrix(NzVector3f* inertia, NzVector3f* center) const;
+
 		nzGeomType GetType() const override;
 
 		template<typename... Args> static NzNullGeomRef New(Args&&... args);
diff --git a/src/Nazara/Physics/Geom.cpp b/src/Nazara/Physics/Geom.cpp
index 5fcf4e8bf..e2676a0df 100644
--- a/src/Nazara/Physics/Geom.cpp
+++ b/src/Nazara/Physics/Geom.cpp
@@ -379,6 +379,15 @@ nzGeomType NzNullGeom::GetType() const
 	return nzGeomType_Null;
 }
 
+void NzNullGeom::ComputeInertialMatrix(NzVector3f* inertia, NzVector3f* center) const
+{
+	if (inertia)
+		inertia->MakeUnit();
+
+	if (center)
+		center->MakeZero();
+}
+
 NewtonCollision* NzNullGeom::CreateHandle(NzPhysWorld* world) const
 {
 	return NewtonCreateNull(world->GetHandle());