diff --git a/src/modules/physics/box2d/ChainShape.cpp b/src/modules/physics/box2d/ChainShape.cpp
index f127be479..2f3a3a1ec 100644
--- a/src/modules/physics/box2d/ChainShape.cpp
+++ b/src/modules/physics/box2d/ChainShape.cpp
@@ -34,10 +34,8 @@ namespace physics
 namespace box2d
 {
 	ChainShape::ChainShape(b2ChainShape * c, bool loop)
-		: loop(loop)
+		: Shape(c), loop(loop)
 	{
-		shape = c;
-		Memoizer::add(shape, this);
 	}
 
 	ChainShape::~ChainShape()
diff --git a/src/modules/physics/box2d/CircleShape.cpp b/src/modules/physics/box2d/CircleShape.cpp
index 752f2f94d..a9123a3b9 100644
--- a/src/modules/physics/box2d/CircleShape.cpp
+++ b/src/modules/physics/box2d/CircleShape.cpp
@@ -33,9 +33,8 @@ namespace physics
 namespace box2d
 {
 	CircleShape::CircleShape(b2CircleShape * c)
+		: Shape(c)
 	{
-		shape = c;
-		Memoizer::add(shape, this);
 	}
 
 	CircleShape::~CircleShape()
diff --git a/src/modules/physics/box2d/EdgeShape.cpp b/src/modules/physics/box2d/EdgeShape.cpp
index 1e90db188..1416419b1 100644
--- a/src/modules/physics/box2d/EdgeShape.cpp
+++ b/src/modules/physics/box2d/EdgeShape.cpp
@@ -33,9 +33,8 @@ namespace physics
 namespace box2d
 {
 	EdgeShape::EdgeShape(b2EdgeShape * e)
+		: Shape(e)
 	{
-		shape = e;
-		Memoizer::add(shape, this);
 	}
 
 	EdgeShape::~EdgeShape()
diff --git a/src/modules/physics/box2d/PolygonShape.cpp b/src/modules/physics/box2d/PolygonShape.cpp
index 62c1a80d2..c77e0106b 100644
--- a/src/modules/physics/box2d/PolygonShape.cpp
+++ b/src/modules/physics/box2d/PolygonShape.cpp
@@ -34,9 +34,8 @@ namespace physics
 namespace box2d
 {
 	PolygonShape::PolygonShape(b2PolygonShape * p)
+		: Shape(p)
 	{
-		shape = p;
-		Memoizer::add(shape, this);
 	}
 
 	PolygonShape::~PolygonShape()