diff --git a/resources/functionMap.php b/resources/functionMap.php
index 57ab6c1bfc..526f62267b 100644
--- a/resources/functionMap.php
+++ b/resources/functionMap.php
@@ -2623,7 +2623,7 @@
 'Exception::__clone' => ['void'],
 'Exception::__construct' => ['void', 'message='=>'string', 'code='=>'int', 'previous='=>'(?Throwable)|(?Exception)'],
 'Exception::__toString' => ['string'],
-'Exception::getCode' => ['mixed'],
+'Exception::getCode' => ['int|string'],
 'Exception::getFile' => ['string'],
 'Exception::getLine' => ['int'],
 'Exception::getMessage' => ['string'],
@@ -12239,7 +12239,7 @@
 'Threaded::synchronized' => ['mixed', 'block'=>'Closure', '...args='=>'mixed'],
 'Threaded::wait' => ['bool', 'timeout='=>'int'],
 'Throwable::__toString' => ['string'],
-'Throwable::getCode' => ['mixed'],
+'Throwable::getCode' => ['int|string'],
 'Throwable::getFile' => ['string'],
 'Throwable::getLine' => ['int'],
 'Throwable::getMessage' => ['string'],
diff --git a/stubs/Exception.stub b/stubs/Exception.stub
index e95c24b250..25fb0699a6 100644
--- a/stubs/Exception.stub
+++ b/stubs/Exception.stub
@@ -9,7 +9,7 @@ interface Throwable
 	public function getMessage();
 
 	/**
-	 * @return mixed
+	 * @return int|string
 	 * @throws void
 	 */
 	public function getCode();
@@ -60,7 +60,7 @@ class Exception implements Throwable
 	final public function getMessage(): string {}
 
 	/**
-	 * @return mixed
+	 * @return int|string
 	 * @throws void
 	 */
 	final public function getCode() {}
@@ -107,7 +107,7 @@ class Error implements Throwable
 	final public function getMessage(): string {}
 
 	/**
-	 * @return mixed
+	 * @return int|string
 	 * @throws void
 	 */
 	final public function getCode() {}
diff --git a/tests/PHPStan/Analyser/data/generics.php b/tests/PHPStan/Analyser/data/generics.php
index 032fa71f17..5489413820 100644
--- a/tests/PHPStan/Analyser/data/generics.php
+++ b/tests/PHPStan/Analyser/data/generics.php
@@ -1400,7 +1400,7 @@ public function process($class): void {
 }
 
 function (\Throwable $e): void {
-	assertType('mixed', $e->getCode());
+	assertType('int|string', $e->getCode());
 };
 
 function (): void {