diff --git a/src/component/1d/multiplicityTree/MultiplicityTree.tsx b/src/component/1d/multiplicityTree/MultiplicityTree.tsx
index 2a72f9efa..81f09d2c9 100644
--- a/src/component/1d/multiplicityTree/MultiplicityTree.tsx
+++ b/src/component/1d/multiplicityTree/MultiplicityTree.tsx
@@ -18,7 +18,7 @@ import { AssignmentActionsButtons } from '../ranges/AssignmentActionsButtons';
 import LevelNode from './LevelNode';
 import StringNode from './StringNode';
 import TreeNodes from './TreeNodes';
-import createTreeNodes, { treeNodeData } from './buildTreeNode';
+import createTreeNodes, { TreeNodeData } from './buildTreeNode';
 
 const styles = {
   cursor: 'default',
@@ -163,7 +163,7 @@ interface TreeResult {
   width: number;
   height: number;
   levelHeight: number;
-  nodes: treeNodeData[];
+  nodes: TreeNodeData[];
   signal: Signal1D;
   range: Omit<Range, 'signals'>;
 }
@@ -179,7 +179,7 @@ function getTree(range: Range, spectrum: Spectrum1D, scale) {
     let width = 0;
     let height = 0;
     let levelHeight = 0;
-    const nodes: treeNodeData[] = [];
+    const nodes: TreeNodeData[] = [];
     let startX = 0;
 
     const { from, to } = range;
diff --git a/src/component/1d/multiplicityTree/buildTreeNode.ts b/src/component/1d/multiplicityTree/buildTreeNode.ts
index c031adb37..4e40f51a3 100644
--- a/src/component/1d/multiplicityTree/buildTreeNode.ts
+++ b/src/component/1d/multiplicityTree/buildTreeNode.ts
@@ -9,18 +9,19 @@ import {
 
 import { TREE_LEVEL_COLORS } from './TreeColors';
 
-export interface treeNodeData {
+export interface TreeNodeData {
   startX: number;
   _startX: number;
   ratio: number;
   multiplicityIndex: number;
   color: string;
 }
+
 function createTreeNodes(signal: Signal1D, spectrumData: Spectrum1D) {
   function buildTreeNodesData(
     multiplicityIndex: number,
     jIndices: number[],
-    treeNodesData: treeNodeData[],
+    treeNodesData: TreeNodeData[],
     startX: number,
   ) {
     if (!signal.multiplicity) {