diff --git a/stubs/mysqli.phpstub b/stubs/mysqli.phpstub
new file mode 100644
index 00000000000..f4244364e34
--- /dev/null
+++ b/stubs/mysqli.phpstub
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * @template TValue
+ *
+ * @template-implements Traversable<int, TValue>
+ */
+class mysqli_result implements Traversable
+{
+    /**
+     * @psalm-taint-sink callable $class
+
+     * @template T of object
+     * @param class-string<T> $class
+     * @param array $constructor_args
+     * @return T|null|false
+     */
+    function fetch_object(string $class = stdClass::class, array $constructor_args = []): object|false|null {}
+}
+
+
+/**
+    * @psalm-taint-sink callable $class
+
+    * @template T of object
+    * @param class-string<T> $class
+    * @param array $constructor_args
+    * @return T|null|false
+    */
+function mysqli_fetch_object(mysqli_result $result, string $class = stdClass::class, array $constructor_args = []): object|false|null {}