diff --git a/src/Type/Php/CurlGetinfoFunctionDynamicReturnTypeExtension.php b/src/Type/Php/CurlGetinfoFunctionDynamicReturnTypeExtension.php
index c21dfee1640..c20cd7c1b4f 100644
--- a/src/Type/Php/CurlGetinfoFunctionDynamicReturnTypeExtension.php
+++ b/src/Type/Php/CurlGetinfoFunctionDynamicReturnTypeExtension.php
@@ -147,6 +147,7 @@ public function getTypeFromFunctionCall(FunctionReflection $functionReflection,
 			'CURLINFO_HTTPAUTH_USED' => $integerFalseType,
 			'CURLINFO_PROXYAUTH_USED' => $integerFalseType,
 			'CURLINFO_CONN_ID' => $integerFalseType,
+			'CURLINFO_SIZE_DELIVERED' => $integerFalseType,
 		];
 
 		foreach ($componentTypesPairedConstants as $constantName => $type) {
@@ -193,6 +194,7 @@ private function createAllComponentsReturnType(): Type
 			'pretransfer_time' => $floatType,
 			'size_upload' => $floatType,
 			'size_download' => $floatType,
+			'size_delivered' => $integerType,
 			'speed_download' => $floatType,
 			'speed_upload' => $floatType,
 			'download_content_length' => $floatType,
diff --git a/tests/PHPStan/Analyser/nsrt/curl_getinfo.php b/tests/PHPStan/Analyser/nsrt/curl_getinfo.php
index 94750ddaccb..2c37238a0c1 100644
--- a/tests/PHPStan/Analyser/nsrt/curl_getinfo.php
+++ b/tests/PHPStan/Analyser/nsrt/curl_getinfo.php
@@ -9,7 +9,7 @@ class Foo
 {
 	public function bar()
 	{
-		$curlGetInfoType = '(array{url: string, content_type: string|null, http_code: int, header_size: int, request_size: int, filetime: int, ssl_verify_result: int, redirect_count: int, total_time: float, namelookup_time: float, connect_time: float, pretransfer_time: float, size_upload: float, size_download: float, speed_download: float, speed_upload: float, download_content_length: float, upload_content_length: float, starttransfer_time: float, redirect_time: float, redirect_url: string, primary_ip: string, certinfo: list<array<string, string>>, primary_port: int, local_ip: string, local_port: int, http_version: int, protocol: int, ssl_verifyresult: int, scheme: string, appconnect_time_us: int, queue_time_us: int, connect_time_us: int, namelookup_time_us: int, pretransfer_time_us: int, redirect_time_us: int, starttransfer_time_us: int, posttransfer_time_us: int, total_time_us: int, request_header: string, effective_method: string, capath: string, cainfo: string, used_proxy: int, httpauth_used: int, proxyauth_used: int, conn_id: int}|false)';
+		$curlGetInfoType = '(array{url: string, content_type: string|null, http_code: int, header_size: int, request_size: int, filetime: int, ssl_verify_result: int, redirect_count: int, total_time: float, namelookup_time: float, connect_time: float, pretransfer_time: float, size_upload: float, size_download: float, size_delivered: int, speed_download: float, speed_upload: float, download_content_length: float, upload_content_length: float, starttransfer_time: float, redirect_time: float, redirect_url: string, primary_ip: string, certinfo: list<array<string, string>>, primary_port: int, local_ip: string, local_port: int, http_version: int, protocol: int, ssl_verifyresult: int, scheme: string, appconnect_time_us: int, queue_time_us: int, connect_time_us: int, namelookup_time_us: int, pretransfer_time_us: int, redirect_time_us: int, starttransfer_time_us: int, posttransfer_time_us: int, total_time_us: int, request_header: string, effective_method: string, capath: string, cainfo: string, used_proxy: int, httpauth_used: int, proxyauth_used: int, conn_id: int}|false)';
 
 		$handle = new CurlHandle();
 		assertType('mixed', curl_getinfo());
diff --git a/tests/PHPStan/Analyser/nsrt/curl_getinfo_8.6.php b/tests/PHPStan/Analyser/nsrt/curl_getinfo_8.6.php
new file mode 100644
index 00000000000..c622cd60b0a
--- /dev/null
+++ b/tests/PHPStan/Analyser/nsrt/curl_getinfo_8.6.php
@@ -0,0 +1,15 @@
+<?php // lint >= 8.6
+
+namespace CurlGetinfo86;
+
+use CurlHandle;
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+	public function bar()
+	{
+		$handle = new CurlHandle();
+		assertType('int|false', curl_getinfo($handle, CURLINFO_SIZE_DELIVERED));
+	}
+}