diff --git a/types/graphql/execution/execute.d.ts b/types/graphql/execution/execute.d.ts
index 6d02b82124..d63a7f93a7 100644
--- a/types/graphql/execution/execute.d.ts
+++ b/types/graphql/execution/execute.d.ts
@@ -33,6 +33,7 @@ export interface ExecutionContext {
  */
 export interface ExecutionResult {
     data?: { [key: string]: any };
+    extensions?: { [key: string]: any };
     errors?: GraphQLError[];
 }