diff --git a/src/Monolog/Formatter/JsonFormatter.php b/src/Monolog/Formatter/JsonFormatter.php
index 6b1a10e5..42735a6b 100644
--- a/src/Monolog/Formatter/JsonFormatter.php
+++ b/src/Monolog/Formatter/JsonFormatter.php
@@ -39,11 +39,12 @@ class JsonFormatter extends NormalizerFormatter
     /**
      * @param self::BATCH_MODE_* $batchMode
      */
-    public function __construct(int $batchMode = self::BATCH_MODE_JSON, bool $appendNewline = true, bool $ignoreEmptyContextAndExtra = false)
+    public function __construct(int $batchMode = self::BATCH_MODE_JSON, bool $appendNewline = true, bool $ignoreEmptyContextAndExtra = false, bool $includeStacktraces = false)
     {
         $this->batchMode = $batchMode;
         $this->appendNewline = $appendNewline;
         $this->ignoreEmptyContextAndExtra = $ignoreEmptyContextAndExtra;
+        $this->includeStacktraces = $includeStacktraces;
 
         parent::__construct();
     }
diff --git a/src/Monolog/Formatter/LineFormatter.php b/src/Monolog/Formatter/LineFormatter.php
index 55272a5b..a855c525 100644
--- a/src/Monolog/Formatter/LineFormatter.php
+++ b/src/Monolog/Formatter/LineFormatter.php
@@ -40,11 +40,12 @@ class LineFormatter extends NormalizerFormatter
      * @param bool        $allowInlineLineBreaks      Whether to allow inline line breaks in log entries
      * @param bool        $ignoreEmptyContextAndExtra
      */
-    public function __construct(?string $format = null, ?string $dateFormat = null, bool $allowInlineLineBreaks = false, bool $ignoreEmptyContextAndExtra = false)
+    public function __construct(?string $format = null, ?string $dateFormat = null, bool $allowInlineLineBreaks = false, bool $ignoreEmptyContextAndExtra = false, bool $includeStacktraces = false)
     {
         $this->format = $format === null ? static::SIMPLE_FORMAT : $format;
         $this->allowInlineLineBreaks = $allowInlineLineBreaks;
         $this->ignoreEmptyContextAndExtra = $ignoreEmptyContextAndExtra;
+        $this->includeStacktraces($includeStacktraces);
         parent::__construct($dateFormat);
     }