SDL2: SDL_SysWMinfo compiler error with clang

I would like to use the SDL_SysWMinfo struct in my program (defined in SDL2/SDL_syswm.h) but when I compile it with clang on OS X I am greeted with the following error:

error: call to implicitly-deleted default constructor of 'SDL_SysWMinfo'
      SDL_SysWMinfo wm_info;
                    ^
/usr/local/include/SDL2/SDL_syswm.h:235:7: note: default constructor of 'SDL_SysWMinfo' is implicitly deleted because field 'info' has a deleted default constructor
    } info;
      ^
/usr/local/include/SDL2/SDL_syswm.h:209:11: note: default constructor of '' is implicitly deleted because variant field 'cocoa' has a non-trivial default constructor
        } cocoa;
          ^
1 error generated.

Am I using the struct wrong? Is this possibly a SDL2 bug?

clang version:

$ clang++ --version
Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
Target: x86_64-apple-darwin14.5.0
Thread model: posix

SDL2 version (from homebrew):

$ brew info sdl2
sdl2: stable 2.0.3 (bottled), HEAD

Edit: There seems to have been a similar question on StackOverflow at some point (see http://ift.tt/1hvd5yO). It seems that it got deleted, but I can't find out why or whether it had been solved.