diff --git a/types/graphql/index.d.ts b/types/graphql/index.d.ts
index e85060bab5..905dcbdd7b 100644
--- a/types/graphql/index.d.ts
+++ b/types/graphql/index.d.ts
@@ -7,6 +7,7 @@
 //                 Kepennar <https://github.com/kepennar>
 //                 Mikhail Novikov <https://github.com/freiksenet>
 //                 Ivan Goncharov <https://github.com/IvanGoncharov>
+//                 Hagai Cohen <https://github.com/DxCx>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
 
diff --git a/types/graphql/subscription/subscribe.d.ts b/types/graphql/subscription/subscribe.d.ts
index b7b40076bf..30efc010ec 100644
--- a/types/graphql/subscription/subscribe.d.ts
+++ b/types/graphql/subscription/subscribe.d.ts
@@ -14,7 +14,7 @@ export function subscribe(
     operationName?: string,
     fieldResolver?: GraphQLFieldResolver<any, any>,
     subscribeFieldResolver?: GraphQLFieldResolver<any, any>
-): AsyncIterator<ExecutionResult>;
+): Promise<AsyncIterator<ExecutionResult> | ExecutionResult>;
 
 export function createSourceEventStream(
     schema: GraphQLSchema,
@@ -26,4 +26,4 @@ export function createSourceEventStream(
     },
     operationName?: string,
     fieldResolver?: GraphQLFieldResolver<any, any>
-): AsyncIterable<any>;
+): Promise<AsyncIterable<any>>;