diff --git a/python-cssutils.spec b/python-cssutils.spec
index 20efe18..bc6b38d 100644
--- a/python-cssutils.spec
+++ b/python-cssutils.spec
@@ -33,6 +33,7 @@ BuildRequires:  %{python_module setuptools}
 BuildRequires:  %{python_module wheel}
 BuildRequires:  fdupes
 BuildRequires:  python-rpm-macros
+Requires:       python-more-itertools
 Requires(post): update-alternatives
 Requires(postun): update-alternatives
 BuildArch:      noarch