diff --git a/libmat2/office.py b/libmat2/office.py
index ebf368991dddf06a1286890a4eb99481a7d0272d..669aa891ec25a58e4ebd6a177fb2f991c0057e40 100644
--- a/libmat2/office.py
+++ b/libmat2/office.py
@@ -520,7 +520,7 @@ class LibreOfficeParser(ZipParser):
             to_randomize.append(element)
 
         for uri, ns in ET._namespace_map.items():
-            if (ns == 'xml'):
+            if ns == 'xml':
                 namespace_xml = uri
 
         assert namespace_xml