--- ./pxr/usd/usdPhysics/rigidBodyAPI.h
+++ ./pxr/usd/usdPhysics/rigidBodyAPI.h
@@ -325,7 +325,7 @@

     /// Mass information function signature, for given UsdPrim gather MassInformation
     typedef MassInformation MassInformationFnSig(const UsdPrim&);    
-    typedef std::function<MassInformationFnSig> MassInformationFn;
+    // typedef std::function<MassInformationFnSig> MassInformationFn;

     /// Compute mass properties of the rigid body
     /// \p diagonalInertia Computed diagonal of the inertial tensor for the rigid body.
@@ -333,9 +333,9 @@
     /// \p principalAxes Inertia tensor's principal axes orienttion for the rigid body.
     /// \p massInfoFn Callback function to get collision mass information.
     /// \return Computed mass of the rigid body
-    USDPHYSICS_API
-    float ComputeMassProperties(GfVec3f* diagonalInertia, GfVec3f* com, GfQuatf* principalAxes, 
-        const MassInformationFn& massInfoFn) const;
+    // USDPHYSICS_API
+    // float ComputeMassProperties(GfVec3f* diagonalInertia, GfVec3f* com, GfQuatf* principalAxes, 
+    //     const MassInformationFn& massInfoFn) const;

 };