How to disable warning C4927 in VS2013 Community

I'm receiving the following warning in my project:

warning C4927: illegal conversion; more than one user-defined conversion has been implicitly applied while calling the constructor 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>::basic_string(const _Elem *)'
      with
      [
          _Elem=char
      ]
      C:\Program Files (x86)\Microsoft Visual Studio 12.0\VC\include\xstring(778) : see declaration of 'std::basic_string<char,std::char_traits<char>,std::allocator<char>>::basic_string'

I understand why it's happening, I'm just unable to suppress it. I've tried adding it to the Disable Specific Warnings list in my project settings, and I've also set my warning level to Turn Off All Warnings (/W0), yet the warning persists. Does anyone have any recommendations on how to hide the message?