diff --git a/compiler/rustc_feature/src/active.rs b/compiler/rustc_feature/src/active.rs
index 56a320c8d3bce..d8e35ceb977b5 100644
--- a/compiler/rustc_feature/src/active.rs
+++ b/compiler/rustc_feature/src/active.rs
@@ -666,6 +666,10 @@ declare_features! (
     /// Allows qualified paths in struct expressions, struct patterns and tuple struct patterns.
     (active, more_qualified_paths, "1.54.0", Some(80080), None),
 
+    /// Allows creation of instances of a struct by moving fields that have
+    /// not changed from prior instances of the same struct (RFC #2528)
+    (active, type_changing_struct_update, "1.55.0", Some(86618), None)
+
     // -------------------------------------------------------------------------
     // feature-group-end: actual feature gates
     // -------------------------------------------------------------------------