diff --git a/packages/react-native/React-Core.podspec b/packages/react-native/React-Core.podspec
index 101b5e9cc10056..e2b1ed82b7622b 100644
--- a/packages/react-native/React-Core.podspec
+++ b/packages/react-native/React-Core.podspec
@@ -22,6 +22,7 @@ socket_rocket_version = '0.7.0'
 boost_compiler_flags = '-Wno-documentation'
 
 use_hermes = ENV['USE_HERMES'] == nil || ENV['USE_HERMES'] == '1'
+use_hermes_flag = use_hermes ? "-DUSE_HERMES=1" : ""
 
 header_subspecs = {
   'CoreModulesHeaders'          => 'React/CoreModules/**/*.h',
@@ -63,7 +64,7 @@ Pod::Spec.new do |s|
   s.platforms              = min_supported_versions
   s.source                 = source
   s.resource_bundle        = { "RCTI18nStrings" => ["React/I18n/strings/*.lproj"]}
-  s.compiler_flags         = folly_compiler_flags + ' ' + boost_compiler_flags
+  s.compiler_flags         = folly_compiler_flags + ' ' + boost_compiler_flags + ' ' + use_hermes_flag
   s.header_dir             = "React"
   s.framework              = "JavaScriptCore"
   s.pod_target_xcconfig    = {
diff --git a/packages/react-native/React/CxxBridge/RCTCxxBridge.mm b/packages/react-native/React/CxxBridge/RCTCxxBridge.mm
index af931fd45ca10f..c6807c194e5682 100644
--- a/packages/react-native/React/CxxBridge/RCTCxxBridge.mm
+++ b/packages/react-native/React/CxxBridge/RCTCxxBridge.mm
@@ -41,15 +41,15 @@
 #import <jsireact/JSIExecutor.h>
 #import <reactperflogger/BridgeNativeModulePerfLogger.h>
 
-#ifndef RCT_USE_HERMES
+#ifndef USE_HERMES
 #if __has_include(<reacthermes/HermesExecutorFactory.h>)
-#define RCT_USE_HERMES 1
+#define USE_HERMES 1
 #else
-#define RCT_USE_HERMES 0
+#define USE_HERMES 0
 #endif
 #endif
 
-#if RCT_USE_HERMES
+#if USE_HERMES
 #import <reacthermes/HermesExecutorFactory.h>
 #else
 #import "JSCExecutorFactory.h"
@@ -423,7 +423,7 @@ - (void)start
     }
     if (!executorFactory) {
       auto installBindings = RCTJSIExecutorRuntimeInstaller(nullptr);
-#if RCT_USE_HERMES
+#if USE_HERMES
       executorFactory = std::make_shared<HermesExecutorFactory>(installBindings);
 #else
       executorFactory = std::make_shared<JSCExecutorFactory>(installBindings);