diff --git a/setup.py b/setup.py
index 88d3e47c1..b661d632a 100644
--- a/setup.py
+++ b/setup.py
@@ -250,6 +250,7 @@ sources = ["examples/pybullet/pybullet.c"]\
 +["src/BulletSoftBody/btDeformableBackwardEulerObjective.cpp"]\
 +["src/BulletSoftBody/btDeformableBodySolver.cpp"]\
 +["src/BulletSoftBody/btDeformableContactProjection.cpp"]\
++["src/BulletSoftBody/btDeformableContactConstraint.cpp"]\
 +["src/BulletSoftBody/btDeformableMultiBodyConstraintSolver.cpp"]\
 +["src/BulletSoftBody/btDeformableMultiBodyDynamicsWorld.cpp"]\
 +["src/BulletInverseDynamics/IDMath.cpp"]\