diff --git a/sources/reactphysics3d/engine/PhysicsWorld.h b/sources/reactphysics3d/engine/PhysicsWorld.h
index 664e9392..fe9dfa9d 100644
--- a/sources/reactphysics3d/engine/PhysicsWorld.h
+++ b/sources/reactphysics3d/engine/PhysicsWorld.h
@@ -25,6 +25,8 @@
 #include <stdexcept>
 #include "../mathematics/mathematics.h"
 #include "../body/Body.h"
+#include "../constraint/Constraint.h"
+#include "../constraint/Contact.h"
 
 // Namespace reactphysics3d
 namespace reactphysics3d {
@@ -90,6 +92,16 @@ inline void PhysicsWorld::setIsGratityOn(bool isGravityOn) {
     this->isGravityOn = isGravityOn;
 }
 
+// Return a start iterator on the constraint list
+inline std::vector<Constraint*>::const_iterator PhysicsWorld::getConstraintListStartIterator() const {
+    return constraintList.begin();
+}
+
+// Return a end iterator on the constraint list
+inline std::vector<Constraint*>::const_iterator PhysicsWorld::getConstraintListEndIterator() const {
+    return constraintList.end();
+}
+
 }   // End of the ReactPhysics3D namespace
 
  #endif