Enable C++17 on Eclipse to Use `Std: :Byte`

I want to use #include <cstddef> and std::byte from c++17 on eclipse photon. I have configured the project to compile using c++17 >> project >> properties >> C/C++ Build >> settings >> GCC C++ Compiler >> Dialect >> Other dialect flags >> -std=c++17 and I have also tried -std=c++1z. My program below can use <cstddef> library, but the line with std::byte does not compile. Eclipse says Type 'std::byte' could not be resolved. How do I make eclipse support C++17?

#include <cstddef>

int main(void) {
    std::byte myByte { 2 };
}

Thanks