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-rw-r--r--compiler/rustc_builtin_macros/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_builtin_macros/src/lib.rs b/compiler/rustc_builtin_macros/src/lib.rs
index f8d93666145..c77ff9eb13c 100644
--- a/compiler/rustc_builtin_macros/src/lib.rs
+++ b/compiler/rustc_builtin_macros/src/lib.rs
@@ -118,6 +118,7 @@ pub fn register_builtin_macros(resolver: &mut dyn ResolverExpand) {
         Clone: clone::expand_deriving_clone,
         Copy: bounds::expand_deriving_copy,
         ConstParamTy: bounds::expand_deriving_const_param_ty,
+        UnsizedConstParamTy: bounds::expand_deriving_unsized_const_param_ty,
         Debug: debug::expand_deriving_debug,
         Default: default::expand_deriving_default,
         Eq: eq::expand_deriving_eq,