diff --git a/OPDS_renderer.php b/OPDS_renderer.php
index 01c8a48..522b04b 100644
--- a/OPDS_renderer.php
+++ b/OPDS_renderer.php
@@ -92,7 +92,9 @@ class OPDSRenderer
             self::getXmlStream ()->startElement ("id");
                 if ($page->idPage)
                 {
-                    self::getXmlStream ()->text ($page->idPage);
+                    $idPage = $page->idPage;
+                    if (!is_null (GetUrlParam (DB))) $idPage = GetUrlParam (DB) . ":" . $idPage;
+                    self::getXmlStream ()->text ($idPage);
                 }
                 else
                 {
diff --git a/base.php b/base.php
index 21e0538..09ca17f 100644
--- a/base.php
+++ b/base.php
@@ -267,6 +267,8 @@ class Entry
                 }
             }
         }
+        
+        if (!is_null (GetUrlParam (DB))) $this->id = GetUrlParam (DB) . ":" . $this->id;
     }
 }
 
@@ -367,7 +369,7 @@ class Page
         if (is_array ($config['calibre_directory']) && is_null ($database)) {
             $i = 0;
             foreach ($config['calibre_directory'] as $key => $value) {
-                array_push ($this->entryArray, new Entry ($key, DB . ":{$i}", 
+                array_push ($this->entryArray, new Entry ($key, "{$i}:cops:catalog", 
                                         "", "text", 
                                         array ( new LinkNavigation ("?" . DB . "={$i}"))));
                 $i++;