diff --git a/packages/turf-invariant/README.md b/packages/turf-invariant/README.md
index 381e2d58e..a8255db7b 100644
--- a/packages/turf-invariant/README.md
+++ b/packages/turf-invariant/README.md
@@ -132,8 +132,6 @@ Get GeoJSON object's type, Geometry type is prioritize.
 ### Parameters
 
 *   `geojson` **[GeoJSON][7]** GeoJSON object
-*   `_name` **[string][8]?** 
-*   `name` **[string][8]** name of the variable to display in error message (unused) (optional, default `"geojson"`)
 
 ### Examples
 
diff --git a/packages/turf-invariant/index.ts b/packages/turf-invariant/index.ts
index a672b17bd..2480a72e5 100644
--- a/packages/turf-invariant/index.ts
+++ b/packages/turf-invariant/index.ts
@@ -250,7 +250,6 @@ function getGeom<G extends Geometry>(geojson: Feature<G> | G): G {
  * Get GeoJSON object's type, Geometry type is prioritize.
  *
  * @param {GeoJSON} geojson GeoJSON object
- * @param {string} [name="geojson"] name of the variable to display in error message (unused)
  * @returns {string} GeoJSON type
  * @example
  * var point = {
@@ -264,20 +263,19 @@ function getGeom<G extends Geometry>(geojson: Feature<G> | G): G {
  * var geom = turf.getType(point)
  * //="Point"
  */
-function getType(
-  geojson: Feature<any> | FeatureCollection<any> | Geometry,
-  _name?: string
-): string {
-  if (geojson.type === "FeatureCollection") {
-    return "FeatureCollection";
-  }
-  if (geojson.type === "GeometryCollection") {
-    return "GeometryCollection";
-  }
+function getType<
+  T extends Geometry | Feature<Geometry | null> | FeatureCollection,
+>(
+  geojson: T
+): T extends Feature<infer G>
+  ? G extends Geometry
+    ? G["type"]
+    : "Feature"
+  : T["type"] {
   if (geojson.type === "Feature" && geojson.geometry !== null) {
-    return geojson.geometry.type;
+    return geojson.geometry.type as any;
   }
-  return geojson.type;
+  return geojson.type as any;
 }
 
 export {
diff --git a/packages/turf-invariant/test.ts b/packages/turf-invariant/test.ts
index 82e6af889..ab3cc620b 100644
--- a/packages/turf-invariant/test.ts
+++ b/packages/turf-invariant/test.ts
@@ -5,8 +5,10 @@ import {
   polygon,
   featureCollection,
   geometryCollection,
+  feature,
 } from "@turf/helpers";
 import * as invariant from "./index.js";
+import { LineString, Point } from "geojson";
 
 test("invariant -- containsNumber", (t) => {
   t.equals(invariant.containsNumber([1, 1]), true);
@@ -367,13 +369,15 @@ test("invariant -- getType", (t) => {
     [0, 1],
     [1, 1],
   ]);
-  const collection = featureCollection([pt, line]);
+  const collection = featureCollection<Point | LineString>([pt, line]);
   const geomCollection = geometryCollection([pt.geometry, line.geometry]);
+  const nullFeature = feature(null);
 
   t.deepEqual(invariant.getType(pt), "Point");
   t.deepEqual(invariant.getType(line.geometry), "LineString");
   t.deepEqual(invariant.getType(geomCollection), "GeometryCollection");
   t.deepEqual(invariant.getType(collection), "FeatureCollection");
+  t.deepEqual(invariant.getType(nullFeature), "Feature");
   // t.throws(() => invariant.getType(null), /geojson is required/, 'geojson is required');
   t.end();
 });