diff --git a/python-pysndfile.changes b/python-pysndfile.changes
index 0c21866..a4fe3ed 100644
--- a/python-pysndfile.changes
+++ b/python-pysndfile.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Thu Feb  7 22:06:30 UTC 2019 - Todd R <toddrme2178@gmail.com>
+
+- Use Cython to rebuild sources properly.
+
 -------------------------------------------------------------------
 Sat Aug 11 06:32:26 UTC 2018 - tchvatal@suse.com
 
diff --git a/python-pysndfile.spec b/python-pysndfile.spec
index ba5c3b7..e62b27a 100644
--- a/python-pysndfile.spec
+++ b/python-pysndfile.spec
@@ -27,6 +27,7 @@ URL:            http://forge.ircam.fr/p/pysndfile
 Source:         https://files.pythonhosted.org/packages/source/p/pysndfile/pysndfile-%{version}.tar.gz
 Source10:       https://forge-2.ircam.fr/roebel/pysndfile/raw/master/COPYING.txt
 Source11:       https://forge-2.ircam.fr/roebel/pysndfile/raw/master/COPYING.LESSER.txt
+BuildRequires:  %{python_module Cython}
 BuildRequires:  %{python_module devel}
 BuildRequires:  %{python_module numpy-devel}
 BuildRequires:  %{python_module pytest}