diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 48335039e9..460fb54da9 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -3,7 +3,7 @@ Yii Framework 2 Change Log
 
 2.0.54 under development
 ------------------------
-
+- Bug #20542: Fix `Formatter` working with more complex ICU unit data structure (OndrejVasicek)
 - Bug #20483: Fix `CompositeAuth` making bad assumptions on `AuthInterface` implementations (sammousa)
 - Bug #20432: Fix PHPStan/Psalm annotations for `ActiveQuery::asArray` (max-s-lab)
 - Bug #20437: Fix PHPStan/Psalm annotations for `BaseArrayHelper::merge` (max-s-lab)
diff --git a/framework/i18n/Formatter.php b/framework/i18n/Formatter.php
index 354382bd27..31efbc22f7 100644
--- a/framework/i18n/Formatter.php
+++ b/framework/i18n/Formatter.php
@@ -1679,7 +1679,7 @@ class Formatter extends Component
 
         $message = [];
         foreach ($unitBundle as $key => $value) {
-            if ($key === 'dnam') {
+            if ($key === 'dnam' || $key === 'case') {
                 continue;
             }
             $message[] = "$key{{$value}}";