diff --git a/src/Reflection/ParametersAcceptorSelector.php b/src/Reflection/ParametersAcceptorSelector.php
index 04f4917b45..353bafc7e0 100644
--- a/src/Reflection/ParametersAcceptorSelector.php
+++ b/src/Reflection/ParametersAcceptorSelector.php
@@ -181,7 +181,9 @@ public static function selectFromArgs(
 
 				$hasTypes = false;
 				$builder = ConstantArrayTypeBuilder::createEmpty();
-				foreach ($optArrayType->getIterableKeyType()->getConstantScalarValues() as $optValue) {
+				foreach ($optArrayType->getIterableKeyType()->getConstantScalarTypes() as $optType) {
+					$optValue = $optType->getValue();
+
 					if (!is_int($optValue)) {
 						$hasTypes = false;
 						break;
@@ -197,6 +199,7 @@ public static function selectFromArgs(
 					$builder->setOffsetValueType(
 						new ConstantIntegerType($optValue),
 						$optValueType,
+						!$optArrayType->hasOffsetValueType($optType)->yes(),
 					);
 				}
 
diff --git a/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php b/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
index 5f4bb1bf7c..895150be05 100644
--- a/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
+++ b/tests/PHPStan/Rules/Functions/CallToFunctionParametersRuleTest.php
@@ -2476,4 +2476,28 @@ public function testClone(): void
 		]);
 	}
 
+	#[RequiresPhp('>= 8.1')]
+	public function testBug13862(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-13862.php'], []);
+	}
+
+	#[RequiresPhp('>= 8.1')]
+	public function testBug13862b(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-13862b.php'], []);
+	}
+
+	#[RequiresPhp('>= 8.1')]
+	public function testBug13862c(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-13862c.php'], [
+			[
+				'Parameter #2 $options of function curl_setopt_array expects array{10022?: non-empty-string}, array{}|array{10022: 123} given.',
+				12,
+				'Offset 10022 (non-empty-string) does not accept type 123.',
+			],
+		]);
+	}
+
 }
diff --git a/tests/PHPStan/Rules/Functions/data/bug-13862.php b/tests/PHPStan/Rules/Functions/data/bug-13862.php
new file mode 100644
index 0000000000..d935c2fa36
--- /dev/null
+++ b/tests/PHPStan/Rules/Functions/data/bug-13862.php
@@ -0,0 +1,66 @@
+<?php
+
+namespace Bug13862;
+
+class foo
+{
+
+	/**
+	 * @param string $url
+	 * @param string $curl_interface
+	 * @param ?int $port
+	 * @param ?string $post
+	 * @return string
+	 */
+	public function getUrl(
+		string  $url,
+		string  $curl_interface = "",
+		?int    $port = null,
+		?string $post = null
+	): string
+	{
+
+		if (empty($url))
+			return "";
+
+		$options = array(
+			CURLOPT_URL => $url,
+			CURLOPT_CONNECTTIMEOUT => 5,
+			CURLOPT_TIMEOUT => 15,
+			CURLOPT_RETURNTRANSFER => true,
+			CURLOPT_PORT => 443,
+			CURLOPT_ENCODING => "gzip, deflate",
+			CURLOPT_HTTPHEADER => array("Accept-Encoding: gzip, deflate")
+		);
+
+		if ($curl_interface != "")
+			$options[CURLOPT_INTERFACE] = $curl_interface;
+
+		if ($port !== null)
+			$options[CURLOPT_PORT] = $port;
+
+		if ($post !== null) {
+			$options[CURLOPT_POST] = true;
+			$options[CURLOPT_POSTFIELDS] = $post;
+			$options[CURLOPT_HTTPHEADER] = array(
+				"Content-Type: application/json;charset=\"UTF-8\"",
+				"Accept: application/json",
+				"Accept-Encoding: gzip, deflate",
+				"Content-Length: " . mb_strlen($post, "UTF-8")
+			);
+		}
+
+		$curl = curl_init();
+		curl_setopt_array($curl, $options);
+		$rc = curl_exec($curl);
+		if (is_bool($rc))
+			return "";
+		else
+			return $rc;
+
+	}
+
+}
+
+$foo = new foo();
+$data = $foo->getUrl("https://example.tld");
diff --git a/tests/PHPStan/Rules/Functions/data/bug-13862b.php b/tests/PHPStan/Rules/Functions/data/bug-13862b.php
new file mode 100644
index 0000000000..daaaa4a5de
--- /dev/null
+++ b/tests/PHPStan/Rules/Functions/data/bug-13862b.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Bug13862b;
+
+$options = [];
+
+if (rand()) {
+	$options[CURLOPT_COOKIE] = 'foo=bar';
+}
+
+$ch = curl_init();
+curl_setopt_array($ch, $options);
diff --git a/tests/PHPStan/Rules/Functions/data/bug-13862c.php b/tests/PHPStan/Rules/Functions/data/bug-13862c.php
new file mode 100644
index 0000000000..1b8ed7511d
--- /dev/null
+++ b/tests/PHPStan/Rules/Functions/data/bug-13862c.php
@@ -0,0 +1,12 @@
+<?php
+
+namespace Bug13862c;
+
+$options = [];
+
+if (rand()) {
+	$options[CURLOPT_COOKIE] = 123;
+}
+
+$ch = curl_init();
+curl_setopt_array($ch, $options);