diff --git a/actions/atompubshowmembership.php b/actions/atompubshowmembership.php
index 1e9d66c56b..1619691769 100644
--- a/actions/atompubshowmembership.php
+++ b/actions/atompubshowmembership.php
@@ -67,7 +67,7 @@ class AtompubshowmembershipAction extends AtompubAction
 
         $this->_membership = Group_member::pkeyGet($kv);
 
-        if (!$this->_profile->isMembmer($this->_group)) {
+        if (!$this->_membership instanceof Group_member) {
             // TRANS: Client exception thrown when trying to show membership of a non-subscribed group
             throw new ClientException(_('Not a member.'), 404);
         }
diff --git a/actions/atompubshowsubscription.php b/actions/atompubshowsubscription.php
index 0d8c361519..ee5a477d49 100644
--- a/actions/atompubshowsubscription.php
+++ b/actions/atompubshowsubscription.php
@@ -70,7 +70,9 @@ class AtompubshowsubscriptionAction extends AtompubAction
                                               $subscribedId), 404);
         }
 
-        if (!$this->_subscriber->isSubscribed($this->_subscribed)) {
+        $this->_subscription = Subscription::pkeyGet(array('subscriber' => $subscriberId,
+                                                           'subscribed' => $subscribedId));
+        if (!$this->_subscription instanceof Subscription) {
             // TRANS: Client exception thrown when trying to display a subscription for a non-subscribed profile ID.
             // TRANS: %1$d is the non-existing subscriber ID number, $2$d is the ID of the profile that was not subscribed to.
             $msg = sprintf(_('Profile %1$d not subscribed to profile %2$d.'),