diff --git a/resources/functionMap.php b/resources/functionMap.php
index 82789aea05..289f7ef697 100644
--- a/resources/functionMap.php
+++ b/resources/functionMap.php
@@ -2776,7 +2776,7 @@
 'get_magic_quotes_gpc' => ['false'],
 'get_magic_quotes_runtime' => ['false'],
 'get_meta_tags' => ['array|false', 'filename'=>'string', 'use_include_path='=>'bool'],
-'get_object_vars' => ['array<string, mixed>', 'obj'=>'object'],
+'get_object_vars' => ['array<array-key, mixed>', 'obj'=>'object'],
 'get_parent_class' => ['class-string|false', 'object='=>'mixed'],
 'get_required_files' => ['list<string>'],
 'get_resource_type' => ['string', 'res'=>'resource'],
diff --git a/tests/PHPStan/Analyser/nsrt/get-object-vars.php b/tests/PHPStan/Analyser/nsrt/get-object-vars.php
new file mode 100644
index 0000000000..5817a63825
--- /dev/null
+++ b/tests/PHPStan/Analyser/nsrt/get-object-vars.php
@@ -0,0 +1,14 @@
+<?php
+
+namespace GetObjectVars;
+
+use function PHPStan\Testing\assertType;
+
+/**
+ * @param object{1: mixed} $object
+ */
+function getObjectVarsWithIntKeyTest(object $object): void
+{
+	assertType('array<mixed>', get_object_vars($object));
+	assertType('array<mixed>', get_object_vars(json_decode('{"1": "test"}')));
+}