diff --git a/passerelle/contrib/toulouse_maelis/models.py b/passerelle/contrib/toulouse_maelis/models.py
index e9a5cb43..a13b3cb4 100644
--- a/passerelle/contrib/toulouse_maelis/models.py
+++ b/passerelle/contrib/toulouse_maelis/models.py
@@ -794,13 +794,17 @@ class ToulouseMaelis(BaseResource, HTTPResource):
     def update_child(self, request, NameID, child_id, post_data):
         family_id = self.get_link(NameID).family_id
         family = self.get_family_raw(family_id)
-        if child_id not in [x['num'] for x in family['childList']]:
-            raise APIError('No child %s to update on family' % child_id, err_code='no-child')
         self.assert_child_payload_in_referential(post_data)
         self.replace_null_values(post_data)
 
         child = post_data
         child['num'] = child_id
+        for known_child in family['childList']:
+            if str(known_child['num']) == child_id:
+                child['authorizedPersonList'] = known_child['authorizedPersonList']
+                break
+        else:
+            raise APIError('No child %s to update on family' % child_id, err_code='no-child')
         payload = {
             'dossierNumber': family_id,
             'category': family['category'],
diff --git a/tests/data/toulouse_maelis/Q_update_child.xml b/tests/data/toulouse_maelis/Q_update_child.xml
index cdb6dd4d..14ba3a7b 100644
--- a/tests/data/toulouse_maelis/Q_update_child.xml
+++ b/tests/data/toulouse_maelis/Q_update_child.xml
@@ -25,6 +25,25 @@
         </birth>
         <bPhoto>true</bPhoto>
         <bLeaveAlone>false</bLeaveAlone>
+        <authorizedPersonList>
+          <personInfo>
+            <num>614719</num>
+            <lastname>BENT</lastname>
+            <firstname>AMEL</firstname>
+            <dateBirth>1985-06-21T00:00:00+02:00</dateBirth>
+            <civility>MME</civility>
+            <sexe>F</sexe>
+            <contact>
+              <phone>0123456789</phone>
+              <mobile>0623456789</mobile>
+              <mail>abent@example.org</mail>
+            </contact>
+          </personInfo>
+          <personQuality>
+            <code>T</code>
+            <libelle>TANTE</libelle>
+          </personQuality>
+        </authorizedPersonList>
       </childList>
     </ns0:updateFamily>
   </soap-env:Body>