diff --git a/packages/main/src/ListItemCustom.ts b/packages/main/src/ListItemCustom.ts
index d8347ca09b93..b6902a86f222 100644
--- a/packages/main/src/ListItemCustom.ts
+++ b/packages/main/src/ListItemCustom.ts
@@ -68,7 +68,7 @@ class ListItemCustom extends ListItem {
 	 * @since 1.0.0-rc.15
 	 */
 	@property()
-	declare accessibleName?: string;
+	accessibleName?: string;
 
 	_onkeydown(e: KeyboardEvent) {
 		const isFocused = this.matches(":focus");
diff --git a/packages/main/src/TreeItemBase.ts b/packages/main/src/TreeItemBase.ts
index ece12b368d7c..89ac62617f06 100644
--- a/packages/main/src/TreeItemBase.ts
+++ b/packages/main/src/TreeItemBase.ts
@@ -171,7 +171,7 @@ class TreeItemBase extends ListItem {
 	 * @since 1.8.0
 	 */
 	@property()
-	declare accessibleName?: string;
+	accessibleName?: string;
 
 	/**
 	 * @private