diff --git a/common.gypi b/common.gypi
index da9076c0044e21..d6f024ab93a365 100644
--- a/common.gypi
+++ b/common.gypi
@@ -37,7 +37,7 @@
 
     # 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.11',
+    'v8_embedder_string': '-node.12',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/compiler/turboshaft/index.h b/deps/v8/src/compiler/turboshaft/index.h
index 86fdab72b769c4..83f85c954273c2 100644
--- a/deps/v8/src/compiler/turboshaft/index.h
+++ b/deps/v8/src/compiler/turboshaft/index.h
@@ -480,7 +480,7 @@ class ConstOrV {
   template <typename U,
             typename = std::enable_if_t<std::is_constructible_v<V<T>, V<U>>>>
   ConstOrV(V<U> index)  // NOLINT(runtime/explicit)
-      : constant_value_(), value_(index) {}
+      : constant_value_(std::nullopt), value_(index) {}
 
   bool is_constant() const { return constant_value_.has_value(); }
   constant_type constant_value() const {