diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index eb126d4a..81d47e3e 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -44,3 +44,7 @@ parameters:
 
         # legacy GelfPHP 1.x failures
         - '# Gelf\\Message::set(Facility|Line|File)\(#'
+
+        # php 8.1 Fiber failures
+        - '#unknown class Fiber#'
+        - '#Offset mixed does not exist on WeakMap<Fiber, int>\|null\.#'
diff --git a/src/Monolog/Logger.php b/src/Monolog/Logger.php
index f9ec27e8..775d7cf1 100644
--- a/src/Monolog/Logger.php
+++ b/src/Monolog/Logger.php
@@ -344,7 +344,6 @@ class Logger implements LoggerInterface, ResettableInterface
         }
 
         if ($this->detectCycles) {
-            // @phpstan-ignore-next-line
             if (\PHP_VERSION_ID >= 80100 && $fiber = \Fiber::getCurrent()) {
                 $this->fiberLogDepth[$fiber] = $this->fiberLogDepth[$fiber] ?? 0;
                 $logDepth = ++$this->fiberLogDepth[$fiber];
@@ -409,7 +408,6 @@ class Logger implements LoggerInterface, ResettableInterface
         } finally {
             if ($this->detectCycles) {
                 if (isset($fiber)) {
-                    // @phpstan-ignore-next-line
                     $this->fiberLogDepth[$fiber]--;
                 } else {
                     $this->logDepth--;