2 files changed, 1 insertions, 3 deletions
diff --git a/compiler/rustc_builtin_macros/src/deriving/clone.rs b/compiler/rustc_builtin_macros/src/deriving/clone.rs
index dde696fca61..f79227d52a8 100644
--- a/compiler/rustc_builtin_macros/src/deriving/clone.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/clone.rs
@@ -113,7 +113,7 @@ fn cs_clone_simple(
                 // Already produced an assertion for this type.
                 // Anonymous structs or unions must be eliminated as they cannot be
                 // type parameters.
-            } else if !field.ty.kind.is_anon_adt() {
+            } else {
                 // let _: AssertParamIsClone<FieldTy>;
                 super::assert_ty_bounds(cx, &mut stmts, field.ty.clone(), field.span, &[
                     sym::clone,
diff --git a/compiler/rustc_builtin_macros/src/deriving/mod.rs b/compiler/rustc_builtin_macros/src/deriving/mod.rs
index d5ee5e430d5..e884c0ec718 100644
--- a/compiler/rustc_builtin_macros/src/deriving/mod.rs
+++ b/compiler/rustc_builtin_macros/src/deriving/mod.rs
@@ -124,8 +124,6 @@ fn assert_ty_bounds(
     span: Span,
     assert_path: &[Symbol],
 ) {
-    // Deny anonymous structs or unions to avoid weird errors.
-    assert!(!ty.kind.is_anon_adt(), "Anonymous structs or unions cannot be type parameters");
     // Generate statement `let _: assert_path<ty>;`.
     let span = cx.with_def_site_ctxt(span);
     let assert_path = cx.path_all(span, true, cx.std_path(assert_path), vec![GenericArg::Type(ty)]);