diff --git a/phpBB/common.php b/phpBB/common.php
index 087eaeef83..9b6913e95f 100644
--- a/phpBB/common.php
+++ b/phpBB/common.php
@@ -19,8 +19,12 @@ if (!defined('IN_PHPBB'))
 $starttime = explode(' ', microtime());
 $starttime = $starttime[1] + $starttime[0];
 
-// Report all errors, except notices
-error_reporting(E_ALL ^ E_NOTICE);
+// Report all errors, except notices and deprecation messages
+if (!defined('E_DEPRECATED'))
+{
+	define('E_DEPRECATED', 8192);
+}
+error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED);
 
 /*
 * Remove variables created by register_globals from the global scope
diff --git a/phpBB/docs/CHANGELOG.html b/phpBB/docs/CHANGELOG.html
index bf33194748..d8858f9970 100644
--- a/phpBB/docs/CHANGELOG.html
+++ b/phpBB/docs/CHANGELOG.html
@@ -102,6 +102,7 @@
 		<li>[Fix] Correctly show topic ATOM feed link when only post id is specified. (Bug #53025)</li>
 		<li>[Fix] Cleanly handle forum/topic not found in ATOM Feeds. (Bug #54295)</li>
 		<li>[Fix] PHP 5.3 compatibility: Check if function dl() exists before calling it. (Bug #54665)</li>
+		<li>[Fix] PHP 5.3 compatibility: Disable E_DEPRECATED on startup to keep set_magic_quotes_runtime(0) quiet. (Bug #54495)</li>
 		<li>[Change] Send time of last item instead of current time in ATOM Feeds. (Bug #53305)</li>
 		<li>[Change] Use em dash instead of hyphen/minus as separator in ATOM Feeds item statistics. (Bug #53565)</li>
 	</ul>
diff --git a/phpBB/install/database_update.php b/phpBB/install/database_update.php
index b7cfdd36b9..bf9c183e0c 100644
--- a/phpBB/install/database_update.php
+++ b/phpBB/install/database_update.php
@@ -30,8 +30,12 @@ define('IN_INSTALL', true);
 $phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './../';
 $phpEx = substr(strrchr(__FILE__, '.'), 1);
 
-// Report all errors, except notices
-//error_reporting(E_ALL ^ E_NOTICE);
+// Report all errors, except notices and deprecation messages
+if (!defined('E_DEPRECATED'))
+{
+	define('E_DEPRECATED', 8192);
+}
+//error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED);
 error_reporting(E_ALL);
 
 @set_time_limit(0);
diff --git a/phpBB/install/index.php b/phpBB/install/index.php
index 47f1787030..eb51ca5fb2 100644
--- a/phpBB/install/index.php
+++ b/phpBB/install/index.php
@@ -18,8 +18,12 @@ define('IN_INSTALL', true);
 $phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './../';
 $phpEx = substr(strrchr(__FILE__, '.'), 1);
 
-// Report all errors, except notices
-error_reporting(E_ALL ^ E_NOTICE);
+// Report all errors, except notices and deprecation messages
+if (!defined('E_DEPRECATED'))
+{
+	define('E_DEPRECATED', 8192);
+}
+error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED);
 
 // @todo Review this test and see if we can find out what it is which prevents PHP 4.2.x from even displaying the page with requirements on it
 if (version_compare(PHP_VERSION, '4.3.3') < 0)
diff --git a/phpBB/style.php b/phpBB/style.php
index 64241f7ed3..fa77815670 100644
--- a/phpBB/style.php
+++ b/phpBB/style.php
@@ -15,8 +15,12 @@ define('IN_PHPBB', true);
 $phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './';
 $phpEx = substr(strrchr(__FILE__, '.'), 1);
 
-// Report all errors, except notices
-error_reporting(E_ALL ^ E_NOTICE);
+// Report all errors, except notices and deprecation messages
+if (!defined('E_DEPRECATED'))
+{
+	define('E_DEPRECATED', 8192);
+}
+error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED);
 
 require($phpbb_root_path . 'config.' . $phpEx);