diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
index 8d935a7ba..fcdbabc2e 100644
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@@ -105,11 +105,6 @@ parameters:
 			count: 1
 			path: src/Handler/CurlMultiHandler.php
 
-		-
-			message: "#^Property GuzzleHttp\\\\Handler\\\\CurlMultiHandler\\:\\:\\$active has unknown class CurlMultiHandle as its type\\.$#"
-			count: 1
-			path: src/Handler/CurlMultiHandler.php
-
 		-
 			message: "#^Return typehint of method GuzzleHttp\\\\Handler\\\\CurlMultiHandler\\:\\:__get\\(\\) has invalid type CurlMultiHandle\\.$#"
 			count: 1
diff --git a/src/Handler/CurlMultiHandler.php b/src/Handler/CurlMultiHandler.php
index 9e2e4703e..2f5b3f69b 100644
--- a/src/Handler/CurlMultiHandler.php
+++ b/src/Handler/CurlMultiHandler.php
@@ -32,9 +32,9 @@ class CurlMultiHandler
     private $selectTimeout;
 
     /**
-     * @var resource|\CurlMultiHandle|null the currently executing resource in `curl_multi_exec`.
+     * @var int Will be higher than 0 when `curl_multi_exec` is still running.
      */
-    private $active;
+    private $active = 0;
 
     /**
      * @var array Request entry handles, indexed by handle id in `addRequest`.