1 files changed, 0 insertions, 9 deletions
diff --git a/setup.py b/setup.py
index 11c4ec67f4..51e5d7eff7 100644
--- a/setup.py
+++ b/setup.py
@@ -922,19 +922,10 @@ class PyBuildExt(build_ext):
                                         'Modules/_blake2/impl/*'))
         blake2_deps.append('hashlib.h')
 
-        blake2_macros = []
-        if (not cross_compiling and
-                os.uname().machine == "x86_64" and
-                sys.maxsize >  2**32):
-            # Every x86_64 machine has at least SSE2.  Check for sys.maxsize
-            # in case that kernel is 64-bit but userspace is 32-bit.
-            blake2_macros.append(('BLAKE2_USE_SSE', '1'))
-
         exts.append( Extension('_blake2',
                                ['_blake2/blake2module.c',
                                 '_blake2/blake2b_impl.c',
                                 '_blake2/blake2s_impl.c'],
-                               define_macros=blake2_macros,
                                depends=blake2_deps) )
 
         sha3_deps = glob(os.path.join(os.getcwd(), srcdir,