diff --git a/src/Monolog/Formatter/LineFormatter.php b/src/Monolog/Formatter/LineFormatter.php
index 0e62aa35..7122319d 100644
--- a/src/Monolog/Formatter/LineFormatter.php
+++ b/src/Monolog/Formatter/LineFormatter.php
@@ -76,6 +76,8 @@ class LineFormatter extends NormalizerFormatter
             }
         }
 
+        $output = preg_replace('/%extra\..+?%/', '', $output);
+
         foreach ($vars['context'] as $var => $val) {
             if (false !== strpos($output, '%context.'.$var.'%')) {
                 $output = str_replace('%context.'.$var.'%', $this->stringify($val), $output);
@@ -83,6 +85,8 @@ class LineFormatter extends NormalizerFormatter
             }
         }
 
+        $output = preg_replace('/%context\..+?%/', '', $output);
+
         if ($this->ignoreEmptyContextAndExtra) {
             if (empty($vars['context'])) {
                 unset($vars['context']);