diff --git a/tools/machinetag.py b/tools/machinetag.py
index 97d5838..c09b8bf 100755
--- a/tools/machinetag.py
+++ b/tools/machinetag.py
@@ -119,7 +119,8 @@ for taxonomy in taxonomies:
                         else:
                             print (machineTag(namespace=namespace, predicate=e['predicate'], value=v['value']))
                         if args.e:
-                            print ("--> " + machineTag(namespace=namespace, predicate=expanded, value=v['expanded']))
+                            if'expanded' in v:
+                                print ("--> " + machineTag(namespace=namespace, predicate=expanded, value=v['expanded']))
 
 if args.a:
     print (doc)