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rbd.pyx is failing to compile with the following error

Compiling rbd.pyx because it changed.
Cythonizing rbd.pyx

Error compiling Cython file:
------------------------------------------------------------
...
    int rbd_snap_is_protected(rbd_image_t image, const char *snap_name,
                              int *is_protected)
    int rbd_snap_set(rbd_image_t image, const char *snapname)
    int rbd_flatten(rbd_image_t image)
    int rbd_rebuild_object_map(rbd_image_t image, librbd_progress_fn_t cb,
                               void *cbdata);
                                           ^
------------------------------------------------------------

rbd.pyx:151:44: Syntax error in C variable declaration
Traceback (most recent call last):
  File "./setup.py", line 47, in <module>
    ], build_dir=os.environ.get("CYTHON_BUILD_DIR", None)),
  File "/usr/lib64/python2.7/site-packages/Cython/Build/Dependencies.py", line 753, in cythonize
    cythonize_one(*args[1:])
  File "/usr/lib64/python2.7/site-packages/Cython/Build/Dependencies.py", line 820, in cythonize_one
    raise CompileError(None, pyx_file)
Cython.Compiler.Errors.CompileError: rbd.pyx
Makefile:28602: recipe for target 'pybind-all' failed
make[3]: *** [pybind-all] Error 1
make[3]: *** Waiting for unfinished jobs....