diff --git a/python-msgpack.spec b/python-msgpack.spec
index 5d49253..61089df 100644
--- a/python-msgpack.spec
+++ b/python-msgpack.spec
@@ -15,6 +15,7 @@ License:        ASL 2.0
 URL:            https://pypi.python.org/pypi/msgpack-python/
 Source0:        https://files.pythonhosted.org/packages/source/m/%{srcname}-python/%{srcname}-python-%{version}.tar.gz
 
+BuildRequires:  Cython
 BuildRequires:  python2-devel
 BuildRequires:  python2-setuptools
 BuildRequires:  python2-pytest