diff --git a/liquidfun/Box2D/lfjs/jsBindings/Dynamics/b2Body.js b/liquidfun/Box2D/lfjs/jsBindings/Dynamics/b2Body.js
index f7653d850..5d9585477 100644
--- a/liquidfun/Box2D/lfjs/jsBindings/Dynamics/b2Body.js
+++ b/liquidfun/Box2D/lfjs/jsBindings/Dynamics/b2Body.js
@@ -82,6 +82,7 @@ function b2Body(ptr) {
   this.buffer = new DataView(Module.HEAPU8.buffer, ptr);
   this.ptr = ptr;
   this.fixtures = [];
+  this.world = null;
 }
 
 b2Body.prototype.ApplyAngularImpulse = function(impulse, wake) {
@@ -110,7 +111,7 @@ b2Body.prototype.CreateFixtureFromDef = function(fixtureDef) {
   fixture._SetPtr(fixtureDef.shape._CreateFixture(this, fixtureDef));
   fixture.body = this;
   b2World._Push(fixture, this.fixtures);
-  world.fixturesLookup[fixture.ptr] = fixture;
+  this.world.fixturesLookup[fixture.ptr] = fixture;
   return fixture;
 };
 
@@ -184,6 +185,10 @@ b2Body.prototype.GetUserData = function() {
   return this.buffer.getUint32(b2Body_userData_offset, true);
 };
 
+b2Body.prototype.GetWorld = function() {
+  return this.world;
+};
+
 b2Body.prototype.GetWorldCenter = function() {
   b2Body_GetWorldCenter(this.ptr, _vec2Buf.byteOffset);
   var result = new Float32Array(_vec2Buf.buffer, _vec2Buf.byteOffset, _vec2Buf.length);
diff --git a/liquidfun/Box2D/lfjs/jsBindings/Dynamics/b2World.js b/liquidfun/Box2D/lfjs/jsBindings/Dynamics/b2World.js
index 5d1fc9a98..8597034bf 100644
--- a/liquidfun/Box2D/lfjs/jsBindings/Dynamics/b2World.js
+++ b/liquidfun/Box2D/lfjs/jsBindings/Dynamics/b2World.js
@@ -133,6 +133,7 @@ b2World.prototype.CreateBody = function(bodyDef) {
     bodyDef.linearVelocity.y, bodyDef.position.x, bodyDef.position.y,
     bodyDef.type, bodyDef.userData));
   b2World._Push(body, this.bodies);
+  body.world = this;
   this.bodiesLookup[body.ptr] = body;
   return body;
 };