diff --git a/include/v8-array-buffer.h b/include/v8-array-buffer.h
index c942ef592f..60ca18bb94 100644
--- a/include/v8-array-buffer.h
+++ b/include/v8-array-buffer.h
@@ -53,6 +53,15 @@ class V8_EXPORT BackingStore : public v8::internal::BackingStoreBase {
    */
   size_t ByteLength() const;
 
+  /**
+   * The maximum length (in bytes) that this backing store may grow to.
+   *
+   * If this backing store was created for a resizable ArrayBuffer or a growable
+   * SharedArrayBuffer, it is >= ByteLength(). Otherwise it is ==
+   * ByteLength().
+   */
+  size_t MaxByteLength() const;
+
   /**
    * Indicates whether the backing store was created for an ArrayBuffer or
    * a SharedArrayBuffer.
diff --git a/src/api/api.cc b/src/api/api.cc
index 3b53d5db76..e51bd24479 100644
--- a/src/api/api.cc
+++ b/src/api/api.cc
@@ -4191,6 +4191,10 @@ size_t v8::BackingStore::ByteLength() const {
   return reinterpret_cast<const i::BackingStore*>(this)->byte_length();
 }
 
+size_t v8::BackingStore::MaxByteLength() const {
+  return reinterpret_cast<const i::BackingStore*>(this)->max_byte_length();
+}
+
 bool v8::BackingStore::IsShared() const {
   return reinterpret_cast<const i::BackingStore*>(this)->is_shared();
 }
diff --git a/test/cctest/test-api-array-buffer.cc b/test/cctest/test-api-array-buffer.cc
index 50feb1d270..667dc1c6e3 100644
--- a/test/cctest/test-api-array-buffer.cc
+++ b/test/cctest/test-api-array-buffer.cc
@@ -833,6 +833,7 @@ TEST(ArrayBuffer_Resizable) {
   CHECK(gsab->GetBackingStore()->IsResizableByUserJavaScript());
   CHECK_EQ(32, gsab->ByteLength());
   CHECK_EQ(1024, gsab->MaxByteLength());
+  CHECK_EQ(gsab->MaxByteLength(), gsab->GetBackingStore()->MaxByteLength());
 }
 
 TEST(ArrayBuffer_FixedLength) {
@@ -848,9 +849,11 @@ TEST(ArrayBuffer_FixedLength) {
   CHECK(!ab->GetBackingStore()->IsResizableByUserJavaScript());
   CHECK_EQ(32, ab->ByteLength());
   CHECK_EQ(32, ab->MaxByteLength());
+  CHECK_EQ(ab->MaxByteLength(), ab->GetBackingStore()->MaxByteLength());
   v8::Local<v8::SharedArrayBuffer> sab =
       CompileRun("new SharedArrayBuffer(32);").As<v8::SharedArrayBuffer>();
   CHECK(!sab->GetBackingStore()->IsResizableByUserJavaScript());
   CHECK_EQ(32, sab->ByteLength());
   CHECK_EQ(32, sab->MaxByteLength());
+  CHECK_EQ(sab->MaxByteLength(), sab->GetBackingStore()->MaxByteLength());
 }