diff --git a/openlayers/index.d.ts b/openlayers/index.d.ts
index 87881edcc1..551f8fa2eb 100644
--- a/openlayers/index.d.ts
+++ b/openlayers/index.d.ts
@@ -12028,6 +12028,7 @@ declare module olx {
          */
         interface GeoJSONOptions {
             defaultDataProjection: ol.ProjectionLike;
+            featureProjection: ol.ProjectionLike;
             geometryName?: string;
         }