diff --git a/ChangeLog b/ChangeLog
index dc2e32c268..67f9d5ab58 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,7 @@ 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 c34059a2d7..c468d664eb 100644
--- a/js/export.js
+++ b/js/export.js
@@ -304,8 +304,15 @@ 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,