diff --git a/src/util.cc b/src/util.cc
index 1512f262fd9..78326b56eab 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -146,12 +146,10 @@ TwoByteValue::TwoByteValue(Isolate* isolate, Local<Value> value) {
   Local<String> string;
   if (!value->ToString(isolate->GetCurrentContext()).ToLocal(&string)) return;
 
-  // Allocate enough space to include the null terminator
-  const size_t storage = string->Length() + 1;
-  AllocateSufficientStorage(storage);
-
-  const int flags = String::NO_NULL_TERMINATION;
-  const int length = string->Write(isolate, out(), 0, storage, flags);
+  // Allocate enough space to include the null terminator.
+  const size_t length = string->Length();
+  AllocateSufficientStorage(length + 1);
+  string->WriteV2(isolate, 0, length, out());
   SetLengthAndZeroTerminate(length);
 }