diff --git a/CHANGELOG b/CHANGELOG
index bac9ee1cf..66db4207a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Fix so install do not fail when one of DB driver checks fails but other drivers exist (#1489178)
 - Fix so exported vCard specifies encoding in v3-compatible format (#1489183)
 - Fix session issues when local and database time differs (#1486132)
 - Fix thread cache syncronization/validation (#1489028)
diff --git a/installer/check.php b/installer/check.php
index fcf35025e..bea8c42e0 100644
--- a/installer/check.php
+++ b/installer/check.php
@@ -139,10 +139,11 @@ foreach ($RCI->supported_dbs as $database => $ext) {
     if (extension_loaded($ext)) {
         // MySQL driver requires PHP >= 5.3 (#1488875)
         if ($ext == 'pdo_mysql' && version_compare(PHP_VERSION, '5.3.0', '<')) {
-            $RCI->fail($database, 'PHP >= 5.3 required');
+            $RCI->fail($database, 'PHP >= 5.3 required', null, true);
         }
         else {
             $RCI->pass($database);
+            $found_db_driver = true;
         }
     }
     else {
@@ -152,6 +153,9 @@ foreach ($RCI->supported_dbs as $database => $ext) {
     }
     echo '<br />';
 }
+if (empty($found_db_driver)) {
+  $RCI->failures++;
+}
 
 ?>
 
diff --git a/installer/rcube_install.php b/installer/rcube_install.php
index c95d936d2..473fd2612 100644
--- a/installer/rcube_install.php
+++ b/installer/rcube_install.php
@@ -496,10 +496,13 @@ class rcube_install
    * @param string Test name
    * @param string Error message
    * @param string URL for details
+   * @param bool   Do not count this failure
    */
-  function fail($name, $message = '', $url = '')
+  function fail($name, $message = '', $url = '', $optional=false)
   {
-    $this->failures++;
+    if (!$optional) {
+      $this->failures++;
+    }
 
     echo Q($name) . ':&nbsp; <span class="fail">NOT OK</span>';
     $this->_showhint($message, $url);