diff --git a/examples/DeformableDemo/Pinch.cpp b/examples/DeformableDemo/Pinch.cpp
index 7c966cc4d..ed811a417 100644
--- a/examples/DeformableDemo/Pinch.cpp
+++ b/examples/DeformableDemo/Pinch.cpp
@@ -314,6 +314,7 @@ void Pinch::initPhysics()
         psb->m_cfg.kDF = 2;
         psb->m_cfg.collisions = btSoftBody::fCollision::SDF_RD;
         getDeformableDynamicsWorld()->addSoftBody(psb);
+        btSoftBodyHelpers::generateBoundaryFaces(psb);
         
         btDeformableMassSpringForce* mass_spring = new btDeformableMassSpringForce(1,0.05);
         getDeformableDynamicsWorld()->addForce(psb, mass_spring);
diff --git a/examples/DeformableDemo/VolumetricDeformable.cpp b/examples/DeformableDemo/VolumetricDeformable.cpp
index 7eaf9aa37..1f23071d4 100644
--- a/examples/DeformableDemo/VolumetricDeformable.cpp
+++ b/examples/DeformableDemo/VolumetricDeformable.cpp
@@ -220,6 +220,7 @@ void VolumetricDeformable::initPhysics()
         psb->m_cfg.kCHR = 1; // collision hardness with rigid body
         psb->m_cfg.kDF = 0.5;
         psb->m_cfg.collisions = btSoftBody::fCollision::SDF_RD;
+        btSoftBodyHelpers::generateBoundaryFaces(psb);
         
         btDeformableGravityForce* gravity_force =  new btDeformableGravityForce(gravity);
         getDeformableDynamicsWorld()->addForce(psb, gravity_force);