diff --git a/src/engine/ContactSolver.cpp b/src/engine/ContactSolver.cpp
index 2967d6d8..e450fbd7 100644
--- a/src/engine/ContactSolver.cpp
+++ b/src/engine/ContactSolver.cpp
@@ -285,7 +285,7 @@ void ContactSolver::initializeContactConstraints() {
 
         // Compute the inverse K matrix for the rolling resistance constraint
         manifold.inverseRollingResistance.setToZero();
-        if (manifold.rollingResistanceFactor > 0 && manifold.isBody1DynamicType || manifold.isBody2DynamicType) {
+        if (manifold.rollingResistanceFactor > 0 && (manifold.isBody1DynamicType || manifold.isBody2DynamicType)) {
             manifold.inverseRollingResistance = manifold.inverseInertiaTensorBody1 + manifold.inverseInertiaTensorBody2;
             manifold.inverseRollingResistance = manifold.inverseRollingResistance.getInverse();
         }
diff --git a/src/engine/Material.cpp b/src/engine/Material.cpp
index a569fccc..7d4d0b70 100644
--- a/src/engine/Material.cpp
+++ b/src/engine/Material.cpp
@@ -31,15 +31,15 @@ using namespace reactphysics3d;
 // Constructor
 Material::Material()
          : mFrictionCoefficient(DEFAULT_FRICTION_COEFFICIENT),
-           mBounciness(DEFAULT_BOUNCINESS),
-           mRollingResistance(DEFAULT_ROLLING_RESISTANCE) {
+           mRollingResistance(DEFAULT_ROLLING_RESISTANCE),
+           mBounciness(DEFAULT_BOUNCINESS) {
 
 }
 
 // Copy-constructor
 Material::Material(const Material& material)
-         : mFrictionCoefficient(material.mFrictionCoefficient), mBounciness(material.mBounciness),
-           mRollingResistance(material.mRollingResistance) {
+         : mFrictionCoefficient(material.mFrictionCoefficient),
+           mRollingResistance(material.mRollingResistance), mBounciness(material.mBounciness) {
 
 }