diff --git a/compiler/rustc_mir/src/const_eval/mod.rs b/compiler/rustc_mir/src/const_eval/mod.rs
index 77531ae2c5f05307341682b9dca7df96b512e206..3f14efc920f0edb3ad9e48033e696b0ae07e96d3 100644
--- a/compiler/rustc_mir/src/const_eval/mod.rs
+++ b/compiler/rustc_mir/src/const_eval/mod.rs
@@ -110,7 +110,7 @@ fn const_to_valtree_inner<'tcx>(
 
             let variant = ecx.read_discriminant(&place.into()).unwrap().1;
 
-            branches(def.variants[variant].fields.len(), Some(variant))
+            branches(def.variants[variant].fields.len(), def.is_enum().then_some(variant))
         }
 
         ty::Never