diff --git a/OdeWorld.cc b/OdeWorld.cc
index 10d6d87..4dc7a00 100644
--- a/OdeWorld.cc
+++ b/OdeWorld.cc
@@ -301,7 +301,7 @@ bool OdeWorld::Object::addCapsule(refptr< std::vector<float> > args)
     dGeomID id = dCreateCapsule(0,
             m_scale * (*args)[0], m_scale * (*args)[1]);
     dMass mass;
-    dMassSetCappedCylinder(&mass, 1.0, 3, m_scale * (*args)[0],
+    dMassSetCapsule(&mass, 1.0, 3, m_scale * (*args)[0],
             m_scale * (*args)[1]);
     setupGeom(id, &mass,
             (*args)[2], (*args)[3], (*args)[4],