diff --git a/compiler/rustc_middle/src/ty/consts/valtree.rs b/compiler/rustc_middle/src/ty/consts/valtree.rs
index 5905076c4d08c..9986d196b8016 100644
--- a/compiler/rustc_middle/src/ty/consts/valtree.rs
+++ b/compiler/rustc_middle/src/ty/consts/valtree.rs
@@ -149,6 +149,7 @@ impl<'tcx> rustc_type_ir::inherent::ValueConst<TyCtxt<'tcx>> for Value<'tcx> {
         self.ty
     }
 
+    #[inline]
     fn valtree(self) -> ValTree<'tcx> {
         self.valtree
     }