diff --git a/ChangeLog b/ChangeLog
index aba3cac1c0..f9307261b1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -55,6 +55,7 @@ phpMyAdmin - ChangeLog
 - bug       Remove extra column heading in view structure page
 - bug       Add missing confirmation when deleting central columns
 - bug       Undefined index DisableIS
+- bug #4763 Database export with more than 512 tables fails
 
 4.3.9.0 (2015-02-05)
 - bug #4728 Incorrect headings in routine editor
diff --git a/js/export.js b/js/export.js
index 787e3c3482..90e6f445f6 100644
--- a/js/export.js
+++ b/js/export.js
@@ -310,8 +310,15 @@ function createAliasModal(event) {
     };
     dlgButtons[PMA_messages.strSaveAndClose] = function() {
         $(this).dialog("close");
+        // do not fillup form submission with empty values
+        $.each($(this).find('input[type="text"]'), function (i, e) {
+            if ($(e).val().trim().length == 0) {
+                $(e).prop('disabled', true);
+            }
+        });
         $('#alias_modal').parent().appendTo($('form[name="dump"]'));
     };
+    $('#alias_modal input[type="text"]').prop('disabled', false);
     $('#alias_modal').dialog({
         width: Math.min($(window).width() - 100, 700),
         modal: true,
diff --git a/libraries/display_export.lib.php b/libraries/display_export.lib.php
index 4efe0c5b21..d7f5ed828b 100644
--- a/libraries/display_export.lib.php
+++ b/libraries/display_export.lib.php
@@ -803,7 +803,7 @@ function PMA_getHtmlForAliasModalDialog($db = '', $table = '')
         }
         $db_input_html .= '<input type="text" name="' . $name_attr . '" '
             . 'placeholder="' . $db . ' alias" class="' . $class . '" '
-            . 'id="' . $id_attr . '" value="' . $val . '"/>';
+            . 'id="' . $id_attr . '" value="' . $val . '" disabled="disabled"/>';
         $db_html .= '<option value="' . $id_attr . '">' . $db . '</option>';
         $table_html .= '<span id="' . $id_attr . '_tables" class="' . $class . '">';
         $table_html .= '<select id="' . $id_attr . '_tables_select" '
@@ -827,7 +827,8 @@ function PMA_getHtmlForAliasModalDialog($db = '', $table = '')
             }
             $table_input_html .= '<input type="text" value="' . $val . '" '
                 . 'name="' . $name_attr . '" id="' . $id_attr . '" '
-                . 'placeholder="' . $table . ' alias" class="' . $class . '"/>';
+                . 'placeholder="' . $table . ' alias" class="' . $class . '" '
+                . 'disabled="disabled"/>';
             $table_html .= '<option value="' . $id_attr . '">'
                 . $table . '</option>';
             $col_html .= '<table id="' . $id_attr . '_cols" class="'