diff --git a/Libraries/Blob/NativeBlobModule.js b/Libraries/Blob/NativeBlobModule.js
index ab2572bd0ea..d58aeeab6eb 100644
--- a/Libraries/Blob/NativeBlobModule.js
+++ b/Libraries/Blob/NativeBlobModule.js
@@ -23,4 +23,38 @@ export interface Spec extends TurboModule {
   +release: (blobId: string) => void;
 }
 
-export default (TurboModuleRegistry.get<Spec>('BlobModule'): ?Spec);
+const NativeModule = TurboModuleRegistry.get<Spec>('BlobModule');
+
+let constants = null;
+let NativeBlobModule = null;
+
+if (NativeModule != null) {
+  NativeBlobModule = {
+    getConstants(): {|BLOB_URI_SCHEME: ?string, BLOB_URI_HOST: ?string|} {
+      if (constants == null) {
+        constants = NativeModule.getConstants();
+      }
+      return constants;
+    },
+    addNetworkingHandler(): void {
+      NativeModule.addNetworkingHandler();
+    },
+    addWebSocketHandler(id: number): void {
+      NativeModule.addWebSocketHandler(id);
+    },
+    removeWebSocketHandler(id: number): void {
+      NativeModule.removeWebSocketHandler(id);
+    },
+    sendOverSocket(blob: Object, socketID: number): void {
+      NativeModule.sendOverSocket(blob, socketID);
+    },
+    createFromParts(parts: Array<Object>, withId: string): void {
+      NativeModule.createFromParts(parts, withId);
+    },
+    release(blobId: string): void {
+      NativeModule.release(blobId);
+    },
+  };
+}
+
+export default (NativeBlobModule: ?Spec);
diff --git a/Libraries/NativeModules/specs/NativeSourceCode.js b/Libraries/NativeModules/specs/NativeSourceCode.js
index 7bcd16bdf8e..903123c94da 100644
--- a/Libraries/NativeModules/specs/NativeSourceCode.js
+++ b/Libraries/NativeModules/specs/NativeSourceCode.js
@@ -19,4 +19,19 @@ export interface Spec extends TurboModule {
   |};
 }
 
-export default (TurboModuleRegistry.getEnforcing<Spec>('SourceCode'): Spec);
+const NativeModule = TurboModuleRegistry.getEnforcing<Spec>('SourceCode');
+let constants = null;
+
+const NativeSourceCode = {
+  getConstants(): {|
+    scriptURL: string,
+  |} {
+    if (constants == null) {
+      constants = NativeModule.getConstants();
+    }
+
+    return constants;
+  },
+};
+
+export default NativeSourceCode;