diff --git a/React/Base/RCTBridgeDelegate.h b/React/Base/RCTBridgeDelegate.h
index f29c7aae4..f866c94cf 100644
--- a/React/Base/RCTBridgeDelegate.h
+++ b/React/Base/RCTBridgeDelegate.h
@@ -63,6 +63,15 @@
  */
 - (NSArray<Class> *)whitelistedModulesForBridge:(RCTBridge *)bridge;
 
+/**
+ * When loading initial JavaScript, do so synchronously when the bridge is created iff
+ * this returns true.  Otherwise, the JS will be fetched on a network thread, and
+ * executed on the JS thread.  Currently used only by C++ bridge.
+ *
+ * @experimental
+ */
+- (BOOL)shouldBridgeLoadJavaScriptSynchronously:(RCTBridge *)bridge;
+
 /**
  * When initializing native modules that require main thread initialization, the bridge
  * will default to dispatch module creation blocks asynchrously. If we're blockingly