diff --git a/sources/reactphysics3d/body/BodyState.cpp b/sources/reactphysics3d/body/BodyState.cpp
index 5ec28a1e..37cf6de8 100644
--- a/sources/reactphysics3d/body/BodyState.cpp
+++ b/sources/reactphysics3d/body/BodyState.cpp
@@ -63,3 +63,8 @@ void BodyState::recalculate() {
     // Compute the spin quaternion
     spin = Quaternion(0, angularVelocity.getX(), angularVelocity.getY(), angularVelocity.getZ()) * orientation * 0.5;
 }
+
+// Overloaded operator for the multiplication with a number
+BodyState BodyState::operator*(double number) const {
+    // TODO : Implement this method
+}
diff --git a/sources/reactphysics3d/body/BodyState.h b/sources/reactphysics3d/body/BodyState.h
index cb907a85..f45fba69 100644
--- a/sources/reactphysics3d/body/BodyState.h
+++ b/sources/reactphysics3d/body/BodyState.h
@@ -68,6 +68,9 @@ class BodyState {
         void setInertiaTensorInverse(const Matrix3x3& inertiaTensorInverse);    // Set the inverse of the inertia tensor
 
         void recalculate();             // Recalculate the secondary values of the BodyState
+
+        // Overloaded operators
+        BodyState operator*(double number) const;       // Overloaded operator for the multiplication with a number
 };
 
 // --- Inlines functions --- //
diff --git a/sources/reactphysics3d/body/RigidBody.h b/sources/reactphysics3d/body/RigidBody.h
index 426d1c4f..2c917097 100644
--- a/sources/reactphysics3d/body/RigidBody.h
+++ b/sources/reactphysics3d/body/RigidBody.h
@@ -60,22 +60,22 @@ class RigidBody : public Body {
 // --- Inline functions --- //
 
 // Return the inertia tensor of the body
-Matrix3x3 RigidBody::getInertiaTensor() const {
+inline Matrix3x3 RigidBody::getInertiaTensor() const {
     return inertiaTensor;
 }
 
 // Set the inertia tensor of the body
-void RigidBody::setInertiaTensor(const Matrix3x3& inertiaTensor) {
+inline void RigidBody::setInertiaTensor(const Matrix3x3& inertiaTensor) {
     this->inertiaTensor = inertiaTensor;
 }
 
 // Return the current state of the body
-BodyState RigidBody::getCurrentBodyState() const {
+inline BodyState RigidBody::getCurrentBodyState() const {
     return currentBodyState;
 }
 
 // Return the previous state of the body
-BodyState RigidBody::getPreviousBodyState() const {
+inline BodyState RigidBody::getPreviousBodyState() const {
     return previousBodyState;
 }