diff --git a/Demos/ColladaDemo/ColladaDemo.cpp b/Demos/ColladaDemo/ColladaDemo.cpp
index 01d522913..0e7956271 100644
--- a/Demos/ColladaDemo/ColladaDemo.cpp
+++ b/Demos/ColladaDemo/ColladaDemo.cpp
@@ -188,7 +188,10 @@ void ColladaDemo::clientMoveAndDisplay()
 {
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
 
-	m_dynamicsWorld->stepSimulation(deltaTime);
+	float dt = m_clock.getTimeMilliseconds() * 0.001f;
+	m_clock.reset();
+
+	m_dynamicsWorld->stepSimulation(dt);
 
 	renderme();
 
diff --git a/Demos/ConstraintDemo/ConstraintDemo.cpp b/Demos/ConstraintDemo/ConstraintDemo.cpp
index e93c37fa3..a2ba68381 100644
--- a/Demos/ConstraintDemo/ConstraintDemo.cpp
+++ b/Demos/ConstraintDemo/ConstraintDemo.cpp
@@ -95,9 +95,11 @@ void ConstraintDemo::clientMoveAndDisplay()
 	
 	 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
 
-	float deltaTime = 1.f/60.f;
+	float dt = m_clock.getTimeMilliseconds() * 0.001f;
+	m_clock.reset();
 
-	m_dynamicsWorld->stepSimulation(deltaTime);
+
+	m_dynamicsWorld->stepSimulation(dt);
 	renderme();
 
     glFlush();
diff --git a/Demos/ConvexDecompositionDemo/ConvexDecompositionDemo.cpp b/Demos/ConvexDecompositionDemo/ConvexDecompositionDemo.cpp
index 322354812..e203f1d49 100644
--- a/Demos/ConvexDecompositionDemo/ConvexDecompositionDemo.cpp
+++ b/Demos/ConvexDecompositionDemo/ConvexDecompositionDemo.cpp
@@ -295,8 +295,10 @@ void ConvexDecompositionDemo::clientMoveAndDisplay()
 {
 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); 
 
+	float dt = m_clock.getTimeMilliseconds() * 0.001f;
+	m_clock.reset();
 
-	m_dynamicsWorld->stepSimulation(deltaTime);
+	m_dynamicsWorld->stepSimulation(dt);
 
 	renderme();