diff --git a/common.gypi b/common.gypi
index aaedbd14bfe597..f8440fef992252 100644
--- a/common.gypi
+++ b/common.gypi
@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.14',
+    'v8_embedder_string': '-node.15',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/include/v8.h b/deps/v8/include/v8.h
index e2871f1c9d8fd7..7999f358ab5e5d 100644
--- a/deps/v8/include/v8.h
+++ b/deps/v8/include/v8.h
@@ -5054,6 +5054,13 @@ class V8_EXPORT BackingStore : public v8::internal::BackingStoreBase {
    */
   bool IsShared() const;
 
+  /**
+   * Prevent implicit instantiation of operator delete with size_t argument.
+   * The size_t argument would be incorrect because ptr points to the
+   * internal BackingStore object.
+   */
+  void operator delete(void* ptr) { ::operator delete(ptr); }
+
   /**
    * Wrapper around ArrayBuffer::Allocator::Reallocate that preserves IsShared.
    * Assumes that the backing_store was allocated by the ArrayBuffer allocator