diff --git a/crates/hir/src/diagnostics.rs b/crates/hir/src/diagnostics.rs
index 6c6c11ea4eb..50374f4b3fe 100644
--- a/crates/hir/src/diagnostics.rs
+++ b/crates/hir/src/diagnostics.rs
@@ -14,6 +14,7 @@ use crate::{MacroKind, Type};
 
 macro_rules! diagnostics {
     ($($diag:ident,)*) => {
+        #[derive(Debug)]
         pub enum AnyDiagnostic {$(
             $diag(Box<$diag>),
         )*}