diff --git a/resources/functionMap.php b/resources/functionMap.php
index c9867cf61d..82789aea05 100644
--- a/resources/functionMap.php
+++ b/resources/functionMap.php
@@ -2098,7 +2098,7 @@
 'explode' => ['list<string>|false', 'separator'=>'string', 'str'=>'string', 'limit='=>'int'],
 'expm1' => ['float', 'number'=>'float'],
 'extension_loaded' => ['bool', 'extension_name'=>'string'],
-'extract' => ['0|positive-int', 'array'=>'array', 'flags='=>'EXTR_OVERWRITE|EXTR_SKIP|EXTR_PREFIX_SAME|EXTR_PREFIX_ALL|EXTR_PREFIX_INVALID|EXTR_IF_EXISTS|EXTR_PREFIX_IF_EXISTS|EXTR_REFS', 'prefix='=>'string|null'],
+'extract' => ['0|positive-int', 'array'=>'array', 'flags='=>'int-mask<EXTR_OVERWRITE|EXTR_SKIP|EXTR_PREFIX_SAME|EXTR_PREFIX_ALL|EXTR_PREFIX_INVALID|EXTR_IF_EXISTS|EXTR_PREFIX_IF_EXISTS|EXTR_REFS>', 'prefix='=>'string|null'],
 'ezmlm_hash' => ['int', 'addr'=>'string'],
 'fam_cancel_monitor' => ['bool', 'fam'=>'resource', 'fam_monitor'=>'resource'],
 'fam_close' => ['void', 'fam'=>'resource'],
diff --git a/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php b/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
index f485a7adee..c3dc4df606 100644
--- a/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
+++ b/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
@@ -2324,6 +2324,11 @@ public function testBug13197(): void
 		$this->analyse([__DIR__ . '/../../Analyser/nsrt/bug-13197.php'], []);
 	}
 
+	public function testBug13434(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-13434.php'], []);
+	}
+
 	public function testBug13556(): void
 	{
 		$this->checkExplicitMixed = true;
diff --git a/tests/PHPStan/Rules/Functions/data/bug-13434.php b/tests/PHPStan/Rules/Functions/data/bug-13434.php
new file mode 100644
index 0000000000..2228a219b1
--- /dev/null
+++ b/tests/PHPStan/Rules/Functions/data/bug-13434.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Bug13434;
+
+extract( $_GET, EXTR_REFS | EXTR_PREFIX_ALL );
+extract( $_GET, EXTR_REFS | EXTR_SKIP );
+
+
+$ftp = ftp_connect('ftp.example.com');
+assert($ftp != false);
+ftp_set_option($ftp, FTP_TIMEOUT_SEC | FTP_AUTOSEEK | 1337, true);