diff --git a/.changeset/treeview-undefined-2.md b/.changeset/treeview-undefined-2.md
new file mode 100644
index 000000000..f0fb94916
--- /dev/null
+++ b/.changeset/treeview-undefined-2.md
@@ -0,0 +1,5 @@
+---
+'react-magma-dom': patch
+---
+
+fix(TreeView): Fix undefined problem
diff --git a/packages/react-magma-dom/src/components/TreeView/useTreeView.ts b/packages/react-magma-dom/src/components/TreeView/useTreeView.ts
index 2763badbd..bd9af92d6 100644
--- a/packages/react-magma-dom/src/components/TreeView/useTreeView.ts
+++ b/packages/react-magma-dom/src/components/TreeView/useTreeView.ts
@@ -161,7 +161,7 @@ export function useTreeView(props: UseTreeViewProps) {
   }, [items, rawInitialExpandedItems]);
 
   const itemToFocus = React.useMemo(() => {
-    const enabledItems = items.filter(item => !item.isDisabled);
+    const enabledItems = items.filter(item => !item?.isDisabled);
     const [firstItem] = enabledItems;
 
     if (selectable === TreeViewSelectable.off) {
@@ -230,13 +230,13 @@ export function useTreeView(props: UseTreeViewProps) {
           item => item.itemId === prevItem.itemId
         );
 
-        if (itemWithUpdatedDisabledState?.isDisabled === prevItem.isDisabled) {
+        if (itemWithUpdatedDisabledState?.isDisabled === prevItem?.isDisabled) {
           return prevItem;
         }
 
         return {
           ...prevItem,
-          isDisabled: itemWithUpdatedDisabledState.isDisabled,
+          isDisabled: itemWithUpdatedDisabledState?.isDisabled,
         };
       });
     });
diff --git a/packages/react-magma-dom/src/components/TreeView/utils.ts b/packages/react-magma-dom/src/components/TreeView/utils.ts
index 050bb2549..5745e9906 100644
--- a/packages/react-magma-dom/src/components/TreeView/utils.ts
+++ b/packages/react-magma-dom/src/components/TreeView/utils.ts
@@ -204,7 +204,7 @@ const getIsDisabled = ({
   const isDisabled =
     preselectedItem?.isDisabled !== undefined
       ? preselectedItem?.isDisabled
-      : props.isDisabled;
+      : props?.isDisabled;
 
   if (selectable === TreeViewSelectable.multi && !checkChildren) {
     return isDisabled;
@@ -281,7 +281,7 @@ const processItemCheckedStatus = ({
 }) => {
   const item = items.find(item => item.itemId === itemId);
 
-  if (item.isDisabled && !forceCheckedStatusForDisabled) {
+  if (item?.isDisabled && !forceCheckedStatusForDisabled) {
     return items;
   }
 
@@ -682,7 +682,7 @@ export const toggleAllMulti = ({
 } & Pick<UseTreeViewProps, 'checkChildren' | 'checkParents'>) => {
   if (!checkChildren) {
     return items.map(item => {
-      if (item.isDisabled) {
+      if (item?.isDisabled) {
         return item;
       }