diff --git a/includes/defines.php b/includes/defines.php
index 4fec740c..a8401f55 100644
--- a/includes/defines.php
+++ b/includes/defines.php
@@ -11,12 +11,13 @@ define('E_AOWOW',                 E_ALL & ~(E_DEPRECATED | E_USER_DEPRECATED | E
 define('JSON_AOWOW_POWER',        JSON_PRETTY_PRINT | JSON_NUMERIC_CHECK | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
 define('FILTER_FLAG_STRIP_AOWOW', FILTER_FLAG_STRIP_LOW | FILTER_FLAG_STRIP_HIGH | FILTER_FLAG_STRIP_BACKTICK);
 
-define('MIME_TYPE_TEXT',   'Content-Type: text/plain; charset=utf-8');
-define('MIME_TYPE_XML',    'Content-Type: text/xml; charset=utf-8');
-define('MIME_TYPE_JSON',   'Content-Type: application/x-javascript; charset=utf-8');
-define('MIME_TYPE_RSS',    'Content-Type: application/rss+xml; charset=utf-8');
-define('MIME_TYPE_JPEG',   'Content-Type: image/jpeg');
-define('MIME_TYPE_PNG',    'Content-Type: image/png');
+define('MIME_TYPE_TEXT',       'Content-Type: text/plain; charset=utf-8');
+define('MIME_TYPE_XML',        'Content-Type: text/xml; charset=utf-8');
+define('MIME_TYPE_JSON',       'Content-Type: application/x-javascript; charset=utf-8');
+define('MIME_TYPE_OPENSEARCH', 'Content-Type: application/x-suggestions+json; charset=utf-8');
+define('MIME_TYPE_RSS',        'Content-Type: application/rss+xml; charset=utf-8');
+define('MIME_TYPE_JPEG',       'Content-Type: image/jpeg');
+define('MIME_TYPE_PNG',        'Content-Type: image/png');
 
 // shared setup strings
 define('ERR_CREATE_FILE',  'could not create file at destination %s');
diff --git a/pages/search.php b/pages/search.php
index 203ff3f0..ca59f8c1 100644
--- a/pages/search.php
+++ b/pages/search.php
@@ -223,12 +223,15 @@ class SearchPage extends GenericPage
             parent::display();                              // errors are handled in the search-template itself
         }
         else if ($this->searchMask & SEARCH_TYPE_OPEN)
-            $result = [$this->search, []];
+        {
+            header(MIME_TYPE_OPENSEARCH);
+            exit(Util::toJSON([$this->search, []]));
+        }
         else if ($this->searchMask & SEARCH_TYPE_JSON)
-            $result = [$this->search, [], []];
-
-        header(MIME_TYPE_JSON);
-        exit(Util::toJSON($result));
+        {
+            header(MIME_TYPE_JSON);
+            exit(Util::toJSON([$this->search, [], []]));
+        }
     }
 
     public function display(string $override = '') : void
@@ -236,7 +239,7 @@ class SearchPage extends GenericPage
         if ($override || ($this->searchMask & SEARCH_TYPE_REGULAR))
             parent::display($override);
         else if ($this->searchMask & SEARCH_TYPE_OPEN)
-            $this->displayExtra([$this, 'generateOpenSearch']);
+            $this->displayExtra([$this, 'generateOpenSearch'], MIME_TYPE_OPENSEARCH);
         else if ($this->searchMask & SEARCH_TYPE_JSON)
             $this->displayExtra([$this, 'generateJsonSearch']);
     }