1 files changed, 10 insertions, 0 deletions
diff --git a/compiler/rustc_attr_data_structures/src/lib.rs b/compiler/rustc_attr_data_structures/src/lib.rs
index 86c73f0d9a0..8f8ce575a18 100644
--- a/compiler/rustc_attr_data_structures/src/lib.rs
+++ b/compiler/rustc_attr_data_structures/src/lib.rs
@@ -49,6 +49,16 @@ pub trait PrintAttribute {
     fn print_attribute(&self, p: &mut Printer);
 }
 
+impl PrintAttribute for u128 {
+    fn should_render(&self) -> bool {
+        true
+    }
+
+    fn print_attribute(&self, p: &mut Printer) {
+        p.word(self.to_string())
+    }
+}
+
 impl<T: PrintAttribute> PrintAttribute for &T {
     fn should_render(&self) -> bool {
         T::should_render(self)