diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f800aa84e..ba787836d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -22,7 +22,8 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ### Fixes
 - Fixed `Flex.Item` children prop type @mnajdova ([#1320](https://github.com/stardust-ui/react/pull/1320))
-- Fixed `Icon`'s color example to align with the latest color updates @mnajdova([#1336](https://github.com/stardust-ui/react/pull/1336))
+- Fixed `Icon`'s color example to align with the latest color updates @mnajdova ([#1336](https://github.com/stardust-ui/react/pull/1336))
+- Fixed `TreeTitle` - `tabIndex` prop should be camel case in behavior @sophieH29 ([#1345](https://github.com/stardust-ui/react/pull/1345))
 
 ### Features
 - Add `selected`, `isFromKeyboard` props to `DropdownItem` @mnajdova ([#1299](https://github.com/stardust-ui/react/pull/1299))
diff --git a/packages/react/src/lib/accessibility/Behaviors/Tree/treeTitleBehavior.ts b/packages/react/src/lib/accessibility/Behaviors/Tree/treeTitleBehavior.ts
index 44ab57daa4..1c6c18be70 100644
--- a/packages/react/src/lib/accessibility/Behaviors/Tree/treeTitleBehavior.ts
+++ b/packages/react/src/lib/accessibility/Behaviors/Tree/treeTitleBehavior.ts
@@ -11,7 +11,7 @@ const treeTitleBehavior: Accessibility = (props: any) => ({
   attributes: {
     root: {
       ...(props.hasSubtree && { 'aria-expanded': props.open ? 'true' : 'false' }),
-      tabindex: 0,
+      tabIndex: 0,
       [IS_FOCUSABLE_ATTRIBUTE]: true,
     },
   },