diff --git a/packages/turf-helpers/index.ts b/packages/turf-helpers/index.ts
index b4fc01ee5..55538fc22 100644
--- a/packages/turf-helpers/index.ts
+++ b/packages/turf-helpers/index.ts
@@ -598,15 +598,20 @@ export function multiPolygon<P extends GeoJsonProperties = GeoJsonProperties>(
  * // => collection
  */
 export function geometryCollection<
+  T extends
+    | Point
+    | LineString
+    | Polygon
+    | MultiPoint
+    | MultiLineString
+    | MultiPolygon,
   P extends GeoJsonProperties = GeoJsonProperties,
 >(
-  geometries: Array<
-    Point | LineString | Polygon | MultiPoint | MultiLineString | MultiPolygon
-  >,
+  geometries: Array<T>,
   properties?: P,
   options: { bbox?: BBox; id?: Id } = {}
-): Feature<GeometryCollection, P> {
-  const geom: GeometryCollection = {
+): Feature<GeometryCollection<T>, P> {
+  const geom: GeometryCollection<T> = {
     type: "GeometryCollection",
     geometries,
   };
diff --git a/packages/turf-line-chunk/index.ts b/packages/turf-line-chunk/index.ts
index 34d8e3da6..41a6770d8 100644
--- a/packages/turf-line-chunk/index.ts
+++ b/packages/turf-line-chunk/index.ts
@@ -15,7 +15,7 @@ import {
  * If the line is shorter than the segment length then the original line is returned.
  *
  * @function
- * @param {FeatureCollection|Geometry|Feature<LineString|MultiLineString>} geojson the lines to split
+ * @param {FeatureCollection|Geometry|Feature<LineString|MultiLineString>} geojson the LineString or MultiLineStrings to split
  * @param {number} segmentLength how long to make each segment
  * @param {Object} [options={}] Optional parameters
  * @param {Units} [options.units='kilometers'] Supports all valid Turf {@link https://turfjs.org/docs/api/types/Units Units}
@@ -34,8 +34,8 @@ function lineChunk<T extends LineString | MultiLineString>(
     | Feature<T>
     | FeatureCollection<T>
     | T
-    | GeometryCollection
-    | Feature<GeometryCollection>,
+    | GeometryCollection<T>
+    | Feature<GeometryCollection<T>>,
   segmentLength: number,
   options: {
     units?: Units;
@@ -57,6 +57,12 @@ function lineChunk<T extends LineString | MultiLineString>(
 
   // Flatten each feature to simple LineString
   flattenEach(geojson, (feature: Feature<T>) => {
+    if (feature.geometry.type !== "LineString") {
+      throw new Error(
+        "Only LineString and MultiLineString geometry types are supported"
+      );
+    }
+
     // reverses coordinates to start the first chunked segment at the end
     if (reverse) {
       feature.geometry.coordinates = feature.geometry.coordinates.reverse();
diff --git a/packages/turf-line-chunk/test.ts b/packages/turf-line-chunk/test.ts
index 45a61f8de..8a27f1f6c 100644
--- a/packages/turf-line-chunk/test.ts
+++ b/packages/turf-line-chunk/test.ts
@@ -106,6 +106,57 @@ test("turf-line-chunk: Prevent input mutation", (t) => {
   t.end();
 });
 
+test("turf-line-chunk: Validate behavior on unsupported geometry types", (t) => {
+  // Point | MultiPoint | LineString | MultiLineString | Polygon | MultiPolygon | GeometryCollection;
+
+  // each of these `as any` casts are required to bypass the TypeScript rejection and actually test the validation underneath
+  t.throws(() => {
+    lineChunk({ type: "Point", geometry: [0, 0] } as any, 10);
+  }, "Point geometries are rejected");
+
+  t.throws(() => {
+    lineChunk({ type: "MultiPoint", geometry: [[0, 0]] } as any, 10);
+  }, "MultiPoint geometries are rejected");
+
+  t.throws(() => {
+    lineChunk(
+      {
+        type: "Polygon",
+        geometry: [
+          [
+            [0, 0],
+            [1, 0],
+            [1, 1],
+            [0, 0],
+          ],
+        ],
+      } as any,
+      10
+    );
+  }, "Polygon geometries are rejected");
+
+  t.throws(() => {
+    lineChunk(
+      {
+        type: "MultiPolygon",
+        geometry: [
+          [
+            [
+              [0, 0],
+              [1, 0],
+              [1, 1],
+              [0, 0],
+            ],
+          ],
+        ],
+      } as any,
+      10
+    );
+  }, "MultiPolygons geometries are rejected");
+
+  t.end();
+});
+
 /**
  * Colorize FeatureCollection
  *