mex compile failed, Matlab R2013a, OSX yosemite.

I am trying to compile a mex file as a part of my program and am getting a clang error.

 clang: error: invalid version number in '-mmacosx-version-min=10.9-std=c++11'

    mex: compile of ' "sor_warping_flow_multichannel_LDOF.cpp"' failed.'

Error using mex (line 206)
Unable to complete successfully.

It seems to be some problem with my mexopts.sh file. Can anyone help me solving this problem?

[Srinivas]

Found the error. There was a space missing. The code needs to be: -mmacosx-version-min=10.9 -std=c++11

[Jan]

Please post this as an answer and accept it, such that the readers know, that it is solved already. Thanks!