diff --git a/React/CxxBridge/RCTCxxBridge.mm b/React/CxxBridge/RCTCxxBridge.mm
index bf1647fc7ac..23222509610 100644
--- a/React/CxxBridge/RCTCxxBridge.mm
+++ b/React/CxxBridge/RCTCxxBridge.mm
@@ -37,9 +37,14 @@
 #import <jsireact/JSIExecutor.h>
 #import <reactperflogger/BridgeNativeModulePerfLogger.h>
 
+#ifndef RCT_USE_HERMES
 #if __has_include(<hermes/hermes.h>)
 #define RCT_USE_HERMES 1
+#else
+#define RCT_USE_HERMES 0
 #endif
+#endif
+
 #if RCT_USE_HERMES
 #import "HermesExecutorFactory.h"
 #else
diff --git a/packages/rn-tester/RNTester/AppDelegate.mm b/packages/rn-tester/RNTester/AppDelegate.mm
index 0b9b534cd68..074e520c0c3 100644
--- a/packages/rn-tester/RNTester/AppDelegate.mm
+++ b/packages/rn-tester/RNTester/AppDelegate.mm
@@ -7,9 +7,14 @@
 
 #import "AppDelegate.h"
 
+#ifndef RCT_USE_HERMES
 #if __has_include(<hermes/hermes.h>)
 #define RCT_USE_HERMES 1
+#else
+#define RCT_USE_HERMES 0
 #endif
+#endif
+
 #if RCT_USE_HERMES
 #import <React/HermesExecutorFactory.h>
 #else
@@ -45,7 +50,6 @@
 #import <react/config/ReactNativeConfig.h>
 #endif
 
-  
 #if DEBUG
 #ifdef FB_SONARKIT_ENABLED
 #import <FlipperKit/FlipperClient.h>