diff --git a/libraries/Scripts.class.php b/libraries/Scripts.class.php
index 8c4b7aab79..f5653061fa 100644
--- a/libraries/Scripts.class.php
+++ b/libraries/Scripts.class.php
@@ -97,7 +97,6 @@ class PMA_Scripts
     /**
      * Generates new PMA_Scripts objects
      *
-     * @return PMA_Scripts object
      */
     public function __construct()
     {
diff --git a/libraries/SystemDatabase.class.php b/libraries/SystemDatabase.class.php
index 54b7e8aa91..93c2f74a4f 100644
--- a/libraries/SystemDatabase.class.php
+++ b/libraries/SystemDatabase.class.php
@@ -31,7 +31,6 @@ class SystemDatabase
      *
      * @param \PMA_DatabaseInterface $dbi Database interface for the system database
      *
-     * @return SystemDatabase
      */
     function __construct(\PMA_DatabaseInterface $dbi)
     {
diff --git a/libraries/plugins/export/PMA_ExportPdf.class.php b/libraries/plugins/export/PMA_ExportPdf.class.php
index 3c6238003e..3d9848f331 100644
--- a/libraries/plugins/export/PMA_ExportPdf.class.php
+++ b/libraries/plugins/export/PMA_ExportPdf.class.php
@@ -337,6 +337,7 @@ class PMA_ExportPdf extends PMA_PDF
         $row = 0;
         $tmpheight = array();
         $maxpage = $this->page;
+        $data = array();
 
         $triggers = $GLOBALS['dbi']->getTriggers($db, $table);
 
@@ -541,6 +542,7 @@ class PMA_ExportPdf extends PMA_PDF
         $row = 0;
         $tmpheight = array();
         $maxpage = $this->page;
+        $data = array();
 
         // fun begin
         foreach ($columns as $column) {