diff --git a/React/Base/RCTBridgeDelegate.h b/React/Base/RCTBridgeDelegate.h
index c5f0cdb40..65f823c96 100644
--- a/React/Base/RCTBridgeDelegate.h
+++ b/React/Base/RCTBridgeDelegate.h
@@ -82,6 +82,15 @@
  */
 - (BOOL)shouldBridgeInitializeNativeModulesSynchronously:(RCTBridge *)bridge;
 
+/**
+ * Configure whether the JSCExecutor created should use the system JSC API or
+ * alternative hooks provided. When returning YES from this method, you must have
+ * previously called facebook::react::setCustomJSCWrapper.
+ *
+ * @experimental
+ */
+- (BOOL)shouldBridgeUseCustomJSC:(RCTBridge *)bridge;
+
 /**
  * The bridge will automatically attempt to load the JS source code from the
  * location specified by the `sourceURLForBridge:` method, however, if you want
diff --git a/ReactCommon/cxxreact/JSCExecutor.cpp b/ReactCommon/cxxreact/JSCExecutor.cpp
index 564ab65c1..680e6bbf0 100644
--- a/ReactCommon/cxxreact/JSCExecutor.cpp
+++ b/ReactCommon/cxxreact/JSCExecutor.cpp
@@ -216,7 +216,15 @@ void JSCExecutor::setContextName(const std::string& name) {
 void JSCExecutor::initOnJSVMThread() throw(JSException) {
   SystraceSection s("JSCExecutor.initOnJSVMThread");
 
+  #if defined(__APPLE__)
+  const bool useCustomJSC = m_jscConfig.getDefault("UseCustomJSC", false).getBool();
+  if (useCustomJSC) {
+    JSC_configureJSCForIOS(true);
+  }
+  #else
   const bool useCustomJSC = false;
+  #endif
+
   #if defined(WITH_FB_JSC_TUNING) && defined(__ANDROID__)
   configureJSCForAndroid(m_jscConfig);
   #endif