diff --git a/tests/test_form_pages.py b/tests/test_form_pages.py
index 073a5a93f..96d253510 100644
--- a/tests/test_form_pages.py
+++ b/tests/test_form_pages.py
@@ -7232,6 +7232,32 @@ def test_field_live_comment_content(pub, http_requests):
     assert live_resp.json['result']['7']['content'] == '<p>bla hello bla</p>'
 
 
+def test_field_live_comment_content_from_structured_item_data(pub, http_requests):
+    FormDef.wipe()
+    formdef = FormDef()
+    formdef.name = 'Foo'
+    formdef.fields = [
+        fields.ItemField(type='item', id='1', label='Foo',
+            varname='bar',
+            data_source={
+                'type': 'json',
+                'value': 'http://remote.example.net/json-list-extra'
+            }
+        ),
+        fields.CommentField(id='7', label='bla {{form_var_bar_structured_foo}} bla', type='comment'),
+    ]
+    formdef.store()
+    formdef.data_class().wipe()
+
+    app = get_app(pub)
+    resp = app.get('/foo/')
+    assert 'f1' in resp.form.fields
+    assert resp.html.find('div', {'data-field-id': '1'}).attrs['data-live-source'] == 'true'
+    resp.form['f1'] = 'a'
+    live_resp = app.post('/foo/live', params=resp.form.submit_fields())
+    assert live_resp.json['result']['7']['content'] == '<p>bla bar bla</p>'
+
+
 def test_form_edit_and_backoffice_field_change(pub):
     create_user(pub)
 
diff --git a/wcs/fields.py b/wcs/fields.py
index 55cab6466..be0d45422 100644
--- a/wcs/fields.py
+++ b/wcs/fields.py
@@ -463,7 +463,9 @@ class Field(object):
             return True
 
     def get_referenced_varnames(self, formdef, value):
-        return re.findall(r'\b%s[_\.]var[_\.]([a-zA-Z0-9_]+?)(?:_raw|\b)' % formdef.var_prefix, value or '')
+        return re.findall(
+                r'\b%s[_\.]var[_\.]([a-zA-Z0-9_]+?)(?:_raw|_live_|_structured_|\b)' % formdef.var_prefix,
+                value or '')
 
     def get_condition_varnames(self, formdef):
         return self.get_referenced_varnames(formdef, self.condition['value'])