diff --git a/python-ruamel.yaml.spec b/python-ruamel.yaml.spec
index 6245cad..8e3bbde 100644
--- a/python-ruamel.yaml.spec
+++ b/python-ruamel.yaml.spec
@@ -47,7 +47,7 @@ rm -rf *egg-info
 
 %install
 %python_install --single-version-externally-managed
-%python_expand %fdupes -s %{buildroot}%{$python_sitearch}
+%python_expand %fdupes %{buildroot}%{$python_sitearch}
 
 %files %{python_files}
 %license LICENSE