diff --git a/types/mapbox-gl/index.d.ts b/types/mapbox-gl/index.d.ts
index f3389876b9..384cea55b6 100644
--- a/types/mapbox-gl/index.d.ts
+++ b/types/mapbox-gl/index.d.ts
@@ -1319,6 +1319,7 @@ declare namespace mapboxgl {
         'fill-extrusion-height-transition'?: Transition;
         'fill-extrusion-base'?: number | StyleFunction | Expression;
         'fill-extrusion-base-transition'?: Transition;
+        'fill-extrusion-vertical-gradient'?: boolean;
     }
 
     export interface LineLayout {