diff --git a/frontend/src/features/InterestPoint/layers/InterestPointLayer.tsx b/frontend/src/features/InterestPoint/layers/InterestPointLayer.tsx
index fbb2b5ff67..fdb99e052e 100644
--- a/frontend/src/features/InterestPoint/layers/InterestPointLayer.tsx
+++ b/frontend/src/features/InterestPoint/layers/InterestPointLayer.tsx
@@ -12,7 +12,7 @@ import { useCallback, useEffect, useRef, useState } from 'react'
 import { v4 as uuidv4 } from 'uuid'
 
 import { getInterestPointStyle, POIStyle } from './interestPoint.style'
-import { InterestPointLine } from './interestPointLine'
+import { InterestPointLine } from './InterestPointLine'
 import { LayerProperties } from '../../../domain/entities/layers/constants'
 import { MapBox, OPENLAYERS_PROJECTION } from '../../../domain/entities/map/constants'
 import { setRightMapBoxOpened } from '../../../domain/shared_slices/Global'
diff --git a/frontend/src/features/InterestPoint/layers/interestPointLine.js b/frontend/src/features/InterestPoint/layers/InterestPointLine.ts
similarity index 55%
rename from frontend/src/features/InterestPoint/layers/interestPointLine.js
rename to frontend/src/features/InterestPoint/layers/InterestPointLine.ts
index aa6374fa32..bac6ad30ed 100644
--- a/frontend/src/features/InterestPoint/layers/interestPointLine.js
+++ b/frontend/src/features/InterestPoint/layers/InterestPointLine.ts
@@ -4,14 +4,18 @@ import LineString from 'ol/geom/LineString'
 export class InterestPointLine {
   static typeProperty = 'type'
   static isHiddenByZoomProperty = 'isHiddenByZoom'
+
   /**
    * InterestPointLine object for building OpenLayers interest point line to draggable overlay
-   * @param {string[]} fromCoordinates - The [longitude, latitude] of the start of the line (the interest point position)
-   * @param {string[]} toCoordinates - The [longitude, latitude] of the overlay position
-   * @param {string} featureId - The feature identifier
+   *
+   * @param fromCoordinates - The [longitude, latitude] of the start of the line (the interest point position)
+   * @param toCoordinates - The [longitude, latitude] of the overlay position
+   * @param featureId - The feature identifier
    */
-  static getFeature(fromCoordinates, toCoordinates, featureId) {
+  static getFeature(fromCoordinates: string[], toCoordinates: string[], featureId: string) {
     const interestPointLineFeature = new Feature({
+      // TODO Fix that: `ype 'string[]' is not assignable to type 'number | Coordinate'.`. Legacy code.
+      // @ts-ignore
       geometry: new LineString([fromCoordinates, toCoordinates])
     })
 
diff --git a/frontend/src/features/InterestPoint/layers/interestPoint.style.tsx b/frontend/src/features/InterestPoint/layers/interestPoint.style.tsx
index f9b452852c..9f3a3ffc29 100644
--- a/frontend/src/features/InterestPoint/layers/interestPoint.style.tsx
+++ b/frontend/src/features/InterestPoint/layers/interestPoint.style.tsx
@@ -4,7 +4,7 @@ import CircleStyle from 'ol/style/Circle'
 import Fill from 'ol/style/Fill'
 import Stroke from 'ol/style/Stroke'
 
-import { InterestPointLine } from './interestPointLine'
+import { InterestPointLine } from './InterestPointLine'
 import { INTEREST_POINT_STYLE, InterestPointType } from '../utils'
 
 const interestPointStylesCache = new Map()