diff --git a/types/openlayers/index.d.ts b/types/openlayers/index.d.ts
index 42587298f0..356ba72429 100644
--- a/types/openlayers/index.d.ts
+++ b/types/openlayers/index.d.ts
@@ -13572,7 +13572,7 @@ declare module olx {
             rotation?: number;
             size?: ol.Size;
             imgSize?: ol.Size;
-            src: string;
+            src?: string;
         }