diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5bf9d475f1c..7ad38b3fcc0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@
     - `FormattedDateTime` and `FormattedZonedDateTime` now implement `Clone` and `Copy` (https://github.com/unicode-org/icu4x/pull/4476)
   - `icu_properties`
     - Add `Aran` script code (https://github.com/unicode-org/icu4x/pull/4426)
+    - Mark `BidiClassAdapter::new` as const (https://github.com/unicode-org/icu4x/pull/4584)
   - `icu_segmenter`
     - Fix Unicode 15.0 line breaking (https://github.com/unicode-org/icu4x/pull/4389)
 - Data model and providers
diff --git a/components/properties/src/bidi.rs b/components/properties/src/bidi.rs
index ecbd6e74edc..5a4a901d189 100644
--- a/components/properties/src/bidi.rs
+++ b/components/properties/src/bidi.rs
@@ -81,7 +81,7 @@ pub struct BidiClassAdapter<'a> {
 
 impl<'a> BidiClassAdapter<'a> {
     /// Creates new instance of `BidiClassAdapter`.
-    pub fn new(data: CodePointMapDataBorrowed<'a, BidiClass>) -> BidiClassAdapter<'a> {
+    pub const fn new(data: CodePointMapDataBorrowed<'a, BidiClass>) -> BidiClassAdapter<'a> {
         BidiClassAdapter { data }
     }
 }