diff --git a/threefive/base.py b/threefive/base.py
index e62ba264..a26ff30c 100644
--- a/threefive/base.py
+++ b/threefive/base.py
@@ -134,7 +134,7 @@ def xml(self, ns="scte35"):
         xml_attrs = self.kv_clean()
         iam = type(self)
         iam = str(iam).split("'", 1)[1].split("'", 1)[0]
-        this = Node(iam, attrs=xml_attrs,ns=ns)
+        this = Node(iam, attrs=xml_attrs, ns=ns)
         return this
 
     @staticmethod