diff --git a/src/util/subscribeToResult.ts b/src/util/subscribeToResult.ts
index ae19fe5795..944921e17f 100644
--- a/src/util/subscribeToResult.ts
+++ b/src/util/subscribeToResult.ts
@@ -30,6 +30,7 @@ export function subscribeToResult<T>(outerSubscriber: OuterSubscriber<any, any>,
       destination.complete();
       return null;
     } else {
+      destination.syncErrorThrowable = true;
       return result.subscribe(destination);
     }
   } else if (isArrayLike(result)) {