diff --git a/Protocols/Http/Session.php b/Protocols/Http/Session.php
index db5b2a2f5..11749ea0c 100644
--- a/Protocols/Http/Session.php
+++ b/Protocols/Http/Session.php
@@ -410,7 +410,7 @@ public function gc()
     public function __destruct()
     {
         $this->save();
-        if (\rand(1, static::$gcProbability[1]) >= static::$gcProbability[0]) {
+        if (\rand(1, static::$gcProbability[1]) <= static::$gcProbability[0]) {
             $this->gc();
         }
     }
@@ -438,4 +438,4 @@ class SessionException extends \RuntimeException
 }
 
 // Init session.
-Session::init();
\ No newline at end of file
+Session::init();