diff --git a/admin/blocks.php b/admin/blocks.php
index 5dd626b7267..ea23c11aa43 100644
--- a/admin/blocks.php
+++ b/admin/blocks.php
@@ -166,7 +166,7 @@
     $table->define_headers(array($strname, $strcourses, $strversion, $strhide.'/'.$strshow, $strmultiple, $strdelete, $strsettings));
     $table->define_baseurl($CFG->wwwroot.'/'.$CFG->admin.'/blocks.php');
     $table->set_attribute('id', 'blocks');
-    $table->set_attribute('class', 'flexible generaltable generalbox');
+    $table->set_attribute('class', 'flexible generaltable generalbox boxaligncenter boxwidthwide');
     $table->setup();
 
     foreach ($blockbyname as $blockname => $blockid) {
diff --git a/admin/filters.php b/admin/filters.php
index 11b15104f83..4ea03cd7db0 100644
--- a/admin/filters.php
+++ b/admin/filters.php
@@ -185,7 +185,7 @@
     $table->define_headers(array($txt->name, $txt->hideshow, $txt->updown, $txt->settings));
     $table->define_baseurl("$CFG->wwwroot/$CFG->admin/filters.php");
     $table->set_attribute('id', 'filters');
-    $table->set_attribute('class', 'flexible generaltable generalbox');
+    $table->set_attribute('class', 'flexible generaltable generalbox boxaligncenter boxwidthwide');
     $table->setup();
 
     // iterate through filters adding to display table
diff --git a/admin/modules.php b/admin/modules.php
index 1994d3de8de..3615e30886c 100644
--- a/admin/modules.php
+++ b/admin/modules.php
@@ -161,7 +161,7 @@
     $table->define_headers(array($stractivitymodule, $stractivities, $strversion, "$strhide/$strshow", $strdelete, $strsettings));
     $table->define_baseurl($CFG->wwwroot.'/'.$CFG->admin.'/modules.php');
     $table->set_attribute('id', 'modules');
-    $table->set_attribute('class', 'flexible generaltable generalbox');
+    $table->set_attribute('class', 'flexible generaltable generalbox boxaligncenter boxwidthwide');
     $table->setup();
 
     foreach ($modulebyname as $modulename => $module) {