diff --git a/types/leaflet/index.d.ts b/types/leaflet/index.d.ts
index 8402d8bc9b..c9f960b3e6 100644
--- a/types/leaflet/index.d.ts
+++ b/types/leaflet/index.d.ts
@@ -494,7 +494,11 @@ export interface TileLayerOptions extends GridLayerOptions {
     zoomReverse?: boolean;
     detectRetina?: boolean;
     crossOrigin?: boolean;
-    [name: string]: any;
+    // [name: string]: any;
+    // You are able add additional properties, but it makes this interface unchackable.
+    // See: https://github.com/DefinitelyTyped/DefinitelyTyped/issues/15313
+    // Example:
+    // tileLayer = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png?{foo}&{bar}&{abc}', {foo: 'bar', bar: (data: any) => 'foo', abc: () => ''});
 }
 
 export class TileLayer extends GridLayer {
diff --git a/types/leaflet/leaflet-tests.ts b/types/leaflet/leaflet-tests.ts
index d1375fa83f..87779c6de7 100644
--- a/types/leaflet/leaflet-tests.ts
+++ b/types/leaflet/leaflet-tests.ts
@@ -227,9 +227,6 @@ tileLayerOptions = {
     pane: '',
     className: '',
     keepBuffer: 1,
-    foo: 'bar',
-    bar: () => 'foo',
-    abc: (data: any) => 'foobar'
 };
 
 tileLayerOptions.subdomains = 'a';
@@ -245,11 +242,9 @@ tileLayerOptions.bounds = latLngBoundsLiteral;
 let tileLayer: L.TileLayer;
 tileLayer = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png');
 tileLayer = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', tileLayerOptions);
-tileLayer = L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png?{foo}&{bar}&{abc}', {foo: 'bar', bar: (data: any) => 'foo', abc: () => ''});
 
 tileLayer = new L.TileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png');
 tileLayer = new L.TileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png', tileLayerOptions);
-tileLayer = new L.TileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png?{foo}&{bar}&{abc}', {foo: 'bar', bar: (data: any) => 'foo', abc: () => ''});
 
 // imageOverlay
 let imageOverlayOptions: L.ImageOverlayOptions;