diff --git a/phpBB/includes/db/dbal.php b/phpBB/includes/db/dbal.php
index b4c1a72e1c..230c9c8ed7 100644
--- a/phpBB/includes/db/dbal.php
+++ b/phpBB/includes/db/dbal.php
@@ -662,12 +662,7 @@ class dbal
 			// The DEBUG_EXTRA constant is for development only!
 			if ((isset($auth) && $auth->acl_get('a_')) || defined('IN_INSTALL') || defined('DEBUG_EXTRA'))
 			{
-				// Print out a nice backtrace...
-				$backtrace = get_backtrace();
-
 				$message .= ($sql) ? '<br /><br />SQL<br /><br />' . htmlspecialchars($sql) : '';
-				$message .= ($backtrace) ? '<br /><br />BACKTRACE<br />' . $backtrace : '';
-				$message .= '<br />';
 			}
 			else
 			{
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 852fc683f2..f625f70c0f 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -3853,6 +3853,13 @@ function msg_handler($errno, $msg_text, $errfile, $errline)
 				}
 			}
 
+			if (defined('IN_INSTALL') || defined('DEBUG_EXTRA') || isset($auth) && $auth->acl_get('a_'))
+			{
+				$backtrace = get_backtrace();
+				$msg_text .= ($backtrace) ? '<br /><br />BACKTRACE<br />' . $backtrace : '';
+				$msg_text .= '<br />';
+			}
+
 			if ((defined('DEBUG') || defined('IN_CRON') || defined('IMAGE_OUTPUT')) && isset($db))
 			{
 				// let's avoid loops