diff --git a/samples/simple_with_v8.cc b/samples/simple_with_v8.cc
index 8b37c72..0bb377a 100644
--- a/samples/simple_with_v8.cc
+++ b/samples/simple_with_v8.cc
@@ -20,7 +20,7 @@
   v8::V8::InitializeExternalStartupData(argv[0]);
   v8::Platform* platform = v8::platform::NewDefaultPlatform().release();
   v8::V8::InitializePlatform(platform);
-#ifdef V8_SANDBOX
+#ifdef V8_ENABLE_SANDBOX
   v8::V8::InitializeSandbox();
 #endif
   v8::V8::Initialize();
diff --git a/testing/v8_initializer.cpp b/testing/v8_initializer.cpp
index 5dcb2bd..d789278 100644
--- a/testing/v8_initializer.cpp
+++ b/testing/v8_initializer.cpp
@@ -80,7 +80,7 @@
   static const char kAdditionalV8Flags[] = "--predictable --expose-gc";
   v8::V8::SetFlagsFromString(kAdditionalV8Flags);
 
-#ifdef V8_SANDBOX
+#ifdef V8_ENABLE_SANDBOX
   v8::V8::InitializeSandbox();
 #endif
   v8::V8::Initialize();