Need to enable C++11 in Codeblocks

I need to enable C++11 in Codeblocks 16.

Several tutorials explain that all one needs to do is select the "Have g++ follow the C++11 ISO C++ language standard [-std=c++11]" option in "Settings > Compiler... > Compiler Settings > Compiler Flags", however such an option does not appear in my Compiler Flags:

Others suggest just pasting "-std=c++11" into "Other compiler options". However this doesn't allow me to build my code and shows this in the "Build Messages" bar:

I am using Codeblocks 16, with the GNU GCC Copmiler that comes with it on Windows 7.