CubicSDR hamlib compiler error

[PA0RWE]

Hi,
after compiling i have got the following error in the hamlib file RigThread.cpp, see below:

/home/rob/CubicSDR/src/rig/RigThread.cpp: In static member function ‘static RigList& RigThread::enumerate()’:
/home/rob/CubicSDR/src/rig/RigThread.cpp:28:37: error: invalid conversion from ‘int (*)(const rig_caps*, void*)’ to ‘int (*)(rig_caps*, void*)’ [-fpermissive]
   28 |         rig_list_foreach(RigThread::add_hamlib_rig, nullptr);
      |                          ~~~~~~~~~~~^~~~~~~~~~~~~~
      |                                     |
      |                                     int (*)(const rig_caps*, void*)

When I remark line 28 in that file the program works as expected but with no Hamlib rigs..
I hope someone can help.
73's
Rob PA0RWE