diff --git a/example/mini_core.rs b/example/mini_core.rs
index 230009741dc..cc3d647c8c8 100644
--- a/example/mini_core.rs
+++ b/example/mini_core.rs
@@ -472,6 +472,7 @@ pub trait Allocator {
 
 impl Allocator for () {}
 
+#[lang = "global_alloc_ty"]
 pub struct Global;
 
 impl Allocator for Global {}