diff --git a/types/relay-runtime/index.d.ts b/types/relay-runtime/index.d.ts
index 93a11a9252..7af27e4934 100644
--- a/types/relay-runtime/index.d.ts
+++ b/types/relay-runtime/index.d.ts
@@ -5,6 +5,7 @@
 //                 Cameron Knight <https://github.com/ckknight>
 //                 Renan Machado <https://github.com/renanmav>
 //                 Stephen Pittman <https://github.com/Stephen2>
+//                 Martin Zlámal <https://github.com/mrtnzlml>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 3.0
 
diff --git a/types/relay-runtime/lib/store/RelayModernStore.d.ts b/types/relay-runtime/lib/store/RelayModernStore.d.ts
index 57ec1b3b31..59be500dcd 100644
--- a/types/relay-runtime/lib/store/RelayModernStore.d.ts
+++ b/types/relay-runtime/lib/store/RelayModernStore.d.ts
@@ -7,7 +7,6 @@ import {
     OperationAvailability,
     OperationDescriptor,
     RecordSource,
-    NormalizationSelector,
     ReaderSelector,
     Snapshot,
     RequestDescriptor,
@@ -22,7 +21,11 @@ import {
 } from './RelayConnection';
 
 export class RelayModernStore implements Store {
-    constructor(source: MutableRecordSource, gcScheduler?: Scheduler, operationLoader?: OperationLoader | null);
+    constructor(source: MutableRecordSource, options?: {
+        gcScheduler?: Scheduler | null,
+        operationLoader?: OperationLoader | null,
+        gcReleaseBufferSize?: number | null,
+    });
     getSource(): RecordSource;
     check(operation: OperationDescriptor, options?: CheckOptions): OperationAvailability;
     retain(operation: OperationDescriptor): Disposable;
diff --git a/types/relay-runtime/relay-runtime-tests.tsx b/types/relay-runtime/relay-runtime-tests.tsx
index 9c04471e02..2597ff74a2 100644
--- a/types/relay-runtime/relay-runtime-tests.tsx
+++ b/types/relay-runtime/relay-runtime-tests.tsx
@@ -16,6 +16,19 @@ import {
 
 const source = new RecordSource();
 const store = new Store(source);
+const storeWithNullOptions = new Store(source, {
+    gcScheduler: null,
+    operationLoader: null,
+    gcReleaseBufferSize: null,
+});
+const storeWithOptions = new Store(source, {
+    gcScheduler: () => undefined,
+    operationLoader: {
+        get: () => null,
+        load: () => Promise.resolve(null),
+    },
+    gcReleaseBufferSize: 10,
+});
 
 // ~~~~~~~~~~~~~~~~~~~~~
 // Network Layer