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-rw-r--r--tests/ui/impl-trait/auto-trait-coherence.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/tests/ui/impl-trait/auto-trait-coherence.rs b/tests/ui/impl-trait/auto-trait-coherence.rs
index 0d7fef21cc9..fdb981ea406 100644
--- a/tests/ui/impl-trait/auto-trait-coherence.rs
+++ b/tests/ui/impl-trait/auto-trait-coherence.rs
@@ -5,6 +5,7 @@
 trait OpaqueTrait {}
 impl<T> OpaqueTrait for T {}
 type OpaqueType = impl OpaqueTrait;
+#[define_opaque(OpaqueType)]
 fn mk_opaque() -> OpaqueType {
     ()
 }