diff --git a/src/librustc_mir/interpret/machine.rs b/src/librustc_mir/interpret/machine.rs
index 11d28ec582a8..69c9664b3515 100644
--- a/src/librustc_mir/interpret/machine.rs
+++ b/src/librustc_mir/interpret/machine.rs
@@ -219,10 +219,7 @@ pub trait Machine<'mir, 'tcx>: Sized {
     ///
     /// This function must be idempotent.
     #[inline]
-    fn canonical_alloc_id(
-        _mem: &Memory<'mir, 'tcx, Self>,
-        id: AllocId,
-    ) -> AllocId {
+    fn canonical_alloc_id(_mem: &Memory<'mir, 'tcx, Self>, id: AllocId) -> AllocId {
         id
     }