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 : '';
-				$message .= '<br />';
 			}
 			else
 			{
diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 852fc683f2..1eefaee651 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -3853,11 +3853,23 @@ function msg_handler($errno, $msg_text, $errfile, $errline)
 				}
 			}
 
+			$log_text = $msg_text;
+			$backtrace = get_backtrace();
+			if ($backtrace)
+			{
+				$log_text .= '<br /><br />BACKTRACE<br />' . $backtrace;
+			}
+
+			if (defined('IN_INSTALL') || defined('DEBUG_EXTRA') || isset($auth) && $auth->acl_get('a_'))
+			{
+				$msg_text = $log_text;
+			}
+
 			if ((defined('DEBUG') || defined('IN_CRON') || defined('IMAGE_OUTPUT')) && isset($db))
 			{
 				// let's avoid loops
 				$db->sql_return_on_error(true);
-				add_log('critical', 'LOG_GENERAL_ERROR', $msg_title, $msg_text);
+				add_log('critical', 'LOG_GENERAL_ERROR', $msg_title, $log_text);
 				$db->sql_return_on_error(false);
 			}