2 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_attr_data_structures/src/attributes.rs b/compiler/rustc_attr_data_structures/src/attributes.rs
index fe947c778b5..9d924023e72 100644
--- a/compiler/rustc_attr_data_structures/src/attributes.rs
+++ b/compiler/rustc_attr_data_structures/src/attributes.rs
@@ -365,6 +365,9 @@ pub enum AttributeKind {
     /// Represents `#[type_const]`.
     TypeConst(Span),
 
+    /// Represents `#[rustc_unsafe_specialization_marker]`.
+    UnsafeSpecializationMarker(Span),
+
     /// Represents `#[used]`
     Used { used_by: UsedBy, span: Span },
     // tidy-alphabetical-end
diff --git a/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs b/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs
index 8833f6102db..5811cfa60c1 100644
--- a/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs
+++ b/compiler/rustc_attr_data_structures/src/encode_cross_crate.rs
@@ -61,6 +61,7 @@ impl AttributeKind {
             TargetFeature(..) => No,
             TrackCaller(..) => Yes,
             TypeConst(..) => Yes,
+            UnsafeSpecializationMarker(..) => No,
             Used { .. } => No,
             // tidy-alphabetical-end
         }