ThingWorx Edge C SDK > Building a ThingWorx Edge C SDK Application > Building Applications with CMake > How to Build with FIPS Mode Enabled
  
How to Build with FIPS Mode Enabled
In addition to working with the OpenSSL library that is provided in the FIPS version of the C SDK, you need to run cmake with the argument, -DENABLE_FIPS_MODE=ON.
For more information about using FIPS mode, see FIPS Mode.