diff --git a/ReactCommon/cxxreact/JSCExecutor.cpp b/ReactCommon/cxxreact/JSCExecutor.cpp
index e92795b44..d977a0ef3 100644
--- a/ReactCommon/cxxreact/JSCExecutor.cpp
+++ b/ReactCommon/cxxreact/JSCExecutor.cpp
@@ -81,13 +81,20 @@ inline JSObjectCallAsFunctionCallback exceptionWrapMethod() {
 
 }
 
+#if DEBUG
 static JSValueRef nativeInjectHMRUpdate(
     JSContextRef ctx,
     JSObjectRef function,
     JSObjectRef thisObject,
     size_t argumentCount,
     const JSValueRef arguments[],
-    JSValueRef *exception);
+    JSValueRef *exception) {
+  String execJSString = Value(ctx, arguments[0]).toString();
+  String jsURL = Value(ctx, arguments[1]).toString();
+  evaluateScript(ctx, execJSString, jsURL);
+  return JSValueMakeUndefined(ctx);
+}
+#endif
 
 std::unique_ptr<JSExecutor> JSCExecutorFactory::createJSExecutor(
     std::shared_ptr<ExecutorDelegate> delegate, std::shared_ptr<MessageQueueThread> jsQueue) {
@@ -189,6 +196,7 @@ void JSCExecutor::initOnJSVMThread() throw(JSException) {
   configureJSCForAndroid(m_jscConfig);
   #endif
 
+  // Create a custom global class, so we can store data in it later using JSObjectSetPrivate
   JSClassRef globalClass = nullptr;
   {
     SystraceSection s("JSClassCreate");
@@ -205,15 +213,21 @@ void JSCExecutor::initOnJSVMThread() throw(JSException) {
 
   installNativeHook<&JSCExecutor::nativeRequireModuleConfig>("nativeRequireModuleConfig");
   installNativeHook<&JSCExecutor::nativeFlushQueueImmediate>("nativeFlushQueueImmediate");
+  installNativeHook<&JSCExecutor::nativeCallSyncHook>("nativeCallSyncHook");
+
+  // Websorker support
   installNativeHook<&JSCExecutor::nativeStartWorker>("nativeStartWorker");
   installNativeHook<&JSCExecutor::nativePostMessageToWorker>("nativePostMessageToWorker");
   installNativeHook<&JSCExecutor::nativeTerminateWorker>("nativeTerminateWorker");
-  installGlobalFunction(m_context, "nativeInjectHMRUpdate", nativeInjectHMRUpdate);
   installNativeHook<&JSCExecutor::nativeCallSyncHook>("nativeCallSyncHook");
 
   installGlobalFunction(m_context, "nativeLoggingHook", JSNativeHooks::loggingHook);
   installGlobalFunction(m_context, "nativePerformanceNow", JSNativeHooks::nowHook);
 
+  #if DEBUG
+  installGlobalFunction(m_context, "nativeInjectHMRUpdate", nativeInjectHMRUpdate);
+  #endif
+
   #if defined(WITH_JSC_EXTRA_TRACING) || DEBUG
   addNativeTracingHooks(m_context);
   #endif
@@ -762,16 +776,4 @@ JSValueRef JSCExecutor::nativeCallSyncHook(
   return Value::fromDynamic(m_context, result.result);
 }
 
-static JSValueRef nativeInjectHMRUpdate(
-    JSContextRef ctx,
-    JSObjectRef function,
-    JSObjectRef thisObject,
-    size_t argumentCount,
-    const JSValueRef arguments[], JSValueRef *exception) {
-  String execJSString = Value(ctx, arguments[0]).toString();
-  String jsURL = Value(ctx, arguments[1]).toString();
-  evaluateScript(ctx, execJSString, jsURL);
-  return JSValueMakeUndefined(ctx);
-}
-
 } }