1 files changed, 3 insertions, 0 deletions
diff --git a/compiler/rustc_lint/src/context.rs b/compiler/rustc_lint/src/context.rs
index 7d5577cdca6..42ead89ca4f 100644
--- a/compiler/rustc_lint/src/context.rs
+++ b/compiler/rustc_lint/src/context.rs
@@ -670,6 +670,9 @@ pub trait LintContext: Sized {
                         json
                     );
                 }
+                BuiltinLintDiagnostics::ProcMacroBackCompat(note) => {
+                    db.note(&note);
+                }
             }
             // Rewrap `db`, and pass control to the user.
             decorate(LintDiagnosticBuilder::new(db));