"inline namespace" cannot be compiled with Intel C++ compiler 16 or 17

I'm using Intel C++ compiler 16 with Visual Studio 2015 (platform toolset v140), which has inline namespace literals {} defined in string file. Intel C++ compiler 16 cannot compile it. I tried Intel C++ compiler 17 too. no luck.

If I set platform toolset to v120, which is Visual Studio 2013's toolset and doesn't have inline namespaces defined, Intel C++ compiler 16 and 17 can compile it.

Can anybody advise how to fix or workaround it? I need VS 2015 to work with Intel compiler for other features.

Thanks,