diff --git a/backend.native/tests/codegen/function/extension.kt b/backend.native/tests/codegen/function/extension.kt
new file mode 100644
index 00000000000..f970f6b90e2
--- /dev/null
+++ b/backend.native/tests/codegen/function/extension.kt
@@ -0,0 +1,3 @@
+class B(val a: Int)
+
+fun B.foo() = this.a
\ No newline at end of file