diff --git a/phpBB/phpbb/db/migration/data/v310/alpha1.php b/phpBB/phpbb/db/migration/data/v310/alpha1.php
index 04f195daeb..bd4861b1f5 100644
--- a/phpBB/phpbb/db/migration/data/v310/alpha1.php
+++ b/phpBB/phpbb/db/migration/data/v310/alpha1.php
@@ -24,6 +24,7 @@ class alpha1 extends \phpbb\db\migration\migration
 			'\phpbb\db\migration\data\v310\config_db_text',
 			'\phpbb\db\migration\data\v310\forgot_password',
 			'\phpbb\db\migration\data\v310\mod_rewrite',
+			'\phpbb\db\migration\data\v310\mysql_fulltext_drop',
 			'\phpbb\db\migration\data\v310\namespaces',
 			'\phpbb\db\migration\data\v310\notifications_cron',
 			'\phpbb\db\migration\data\v310\notification_options_reconvert',
diff --git a/phpBB/phpbb/db/migration/data/v310/mysql_fulltext_drop.php b/phpBB/phpbb/db/migration/data/v310/mysql_fulltext_drop.php
new file mode 100644
index 0000000000..97d174d4bc
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v310/mysql_fulltext_drop.php
@@ -0,0 +1,47 @@
+<?php
+/**
+*
+* @package migration
+* @copyright (c) 2013 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+namespace phpbb\db\migration\data\v310;
+
+class mysql_fulltext_drop extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		// This migration is irrelevant for all non-MySQL DBMSes.
+		return strpos($this->db->sql_layer, 'mysql') === false;
+	}
+
+	static public function depends_on()
+	{
+		return array(
+			'\phpbb\db\migration\data\v310\dev',
+		);
+	}
+
+	public function update_schema()
+	{
+		/*
+		* Drop FULLTEXT indexes related to MySQL fulltext search.
+		* Doing so is equivalent to dropping the search index from the ACP.
+		* Possibly time-consuming recreation of the search index (i.e.
+		* FULLTEXT indexes) is left as a task to the admin to not
+		* unnecessarily stall the upgrade process. The new search index will
+		* then require about 40% less table space (also see PHPBB3-11621).
+		*/
+		return array(
+			'drop_keys' => array(
+				$this->table_prefix . 'posts' => array(
+					'post_subject',
+					'post_text',
+					'post_content',
+				),
+			),
+		);
+	}
+}
diff --git a/phpBB/phpbb/search/fulltext_mysql.php b/phpBB/phpbb/search/fulltext_mysql.php
index 50d2d2577f..ca2f42358f 100644
--- a/phpBB/phpbb/search/fulltext_mysql.php
+++ b/phpBB/phpbb/search/fulltext_mysql.php
@@ -781,7 +781,7 @@ class fulltext_mysql extends \phpbb\search\base
 			$alter[] = 'ADD FULLTEXT (post_subject)';
 		}
 
-		if (!isset($this->stats['post_text']))
+		if (!isset($this->stats['post_content']))
 		{
 			if ($this->db->sql_layer == 'mysqli' || version_compare($this->db->sql_server_info(true), '4.1.3', '>='))
 			{
@@ -791,12 +791,8 @@ class fulltext_mysql extends \phpbb\search\base
 			{
 				$alter[] = 'MODIFY post_text mediumtext NOT NULL';
 			}
-			$alter[] = 'ADD FULLTEXT (post_text)';
-		}
 
-		if (!isset($this->stats['post_content']))
-		{
-			$alter[] = 'ADD FULLTEXT post_content (post_subject, post_text)';
+			$alter[] = 'ADD FULLTEXT post_content (post_text, post_subject)';
 		}
 
 		if (sizeof($alter))
@@ -834,11 +830,6 @@ class fulltext_mysql extends \phpbb\search\base
 			$alter[] = 'DROP INDEX post_subject';
 		}
 
-		if (isset($this->stats['post_text']))
-		{
-			$alter[] = 'DROP INDEX post_text';
-		}
-
 		if (isset($this->stats['post_content']))
 		{
 			$alter[] = 'DROP INDEX post_content';
@@ -864,7 +855,7 @@ class fulltext_mysql extends \phpbb\search\base
 			$this->get_stats();
 		}
 
-		return (isset($this->stats['post_text']) && isset($this->stats['post_subject']) && isset($this->stats['post_content'])) ? true : false;
+		return isset($this->stats['post_subject']) && isset($this->stats['post_content']);
 	}
 
 	/**
@@ -904,11 +895,7 @@ class fulltext_mysql extends \phpbb\search\base
 
 			if ($index_type == 'FULLTEXT')
 			{
-				if ($row['Key_name'] == 'post_text')
-				{
-					$this->stats['post_text'] = $row;
-				}
-				else if ($row['Key_name'] == 'post_subject')
+				if ($row['Key_name'] == 'post_subject')
 				{
 					$this->stats['post_subject'] = $row;
 				}