diff --git a/hosting_https.module b/hosting_https.module
index 7447d91..3abd580 100644
--- a/hosting_https.module
+++ b/hosting_https.module
@@ -104,11 +104,11 @@ function hosting_https_is_available($site, $check_server_access = TRUE) {
   $https_available = FALSE;
 
   if (isset($site->nid)) {
+    $https_available = TRUE;
     $platform = node_load($site->platform);
-    $server = node_load($platform->web_server);
-
-    if ($server->services['http']->https_enabled) {
-      $https_available = TRUE;
+    $servers = _hosting_https_get_platform_servers($platform);
+    foreach ($servers as $server) {
+      $https_available = $https_available && $server->services['http']->https_enabled;
     }
   }
   elseif (count(hosting_https_get_servers($check_server_access)) > 0) {
@@ -117,3 +117,27 @@ function hosting_https_is_available($site, $check_server_access = TRUE) {
 
   return $https_available;
 }
+
+function _hosting_https_get_platform_servers($platform) {
+  $server = node_load($platform->web_server);
+  $servers = array();
+
+  if ($server->services['http']->type == 'cluster') {
+    foreach ($server->services['http']->web_servers as $nid) {
+      $servers[] = node_load($nid);
+    }
+  }
+  elseif ($server->services['http']->type == 'pack') {
+    foreach ($server->services['http']->master_servers as $nid) {
+      $servers[] = node_load($nid);
+    }
+    foreach ($server->services['http']->slave_servers as $nid) {
+      $servers[] = node_load($nid);
+    }
+  }
+  else {
+    $servers[] = $server;
+  }
+
+  return $servers;
+}
diff --git a/hosting_https.nodeapi.inc b/hosting_https.nodeapi.inc
index e0292dc..d547607 100644
--- a/hosting_https.nodeapi.inc
+++ b/hosting_https.nodeapi.inc
@@ -153,19 +153,21 @@ function hosting_https_site_form_validate($form, $form_state) {
     // Check that the server to host this site has HTTPS enabled.
     if (!empty($node->platform)) {
       $platform = node_load($node->platform);
-      $server = node_load($platform->web_server);
-      if (!$server->services['http']->https_enabled) {
-        $server_name = strlen($server->human_name) ? $server->human_name : $server->title;
-        $server_edit_path = 'node/' . $server->nid . '/edit';
-        if (drupal_valid_path($server_edit_path, TRUE)) {
-          $enable = t('Enable HTTPS on !server.', array('!server' => l($server_name, $server_edit_path)));
+      $servers = _hosting_https_get_platform_servers($platform);
+      foreach ($servers as $server) {
+        if (!$server->services['http']->https_enabled) {
+          $server_name = strlen($server->human_name) ? $server->human_name : $server->title;
+          $server_edit_path = 'node/' . $server->nid . '/edit';
+          if (drupal_valid_path($server_edit_path, TRUE)) {
+            $enable = t('Enable HTTPS on !server.', array('!server' => l($server_name, $server_edit_path)));
+          }
+          else {
+            $enable = t('Ask your site administrator to enable HTTPS.');
+          }
+          return form_set_error('hosting_https_wrapper', t("This site's platform is installed on a server that does not have HTTPS enabled. !enable", array(
+            '!enable' => $enable,
+          )));
         }
-        else {
-          $enable = t('Ask your site administrator to enable HTTPS.');
-        }
-        return form_set_error('hosting_https_wrapper', t("This site's platform is installed on a server that does not have HTTPS enabled. !enable", array(
-          '!enable' => $enable,
-        )));
       }
     }
   }