diff --git a/common.gypi b/common.gypi
index 5f8750afc311e9..a70b91fa05fb78 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.8',
+    'v8_embedder_string': '-node.9',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/parsing/parser.h b/deps/v8/src/parsing/parser.h
index c5cc0c8030781c..5699148c3b3575 100644
--- a/deps/v8/src/parsing/parser.h
+++ b/deps/v8/src/parsing/parser.h
@@ -709,6 +709,13 @@ class V8_EXPORT_PRIVATE Parser : public NON_EXPORTED_BASE(ParserBase<Parser>) {
     return arg;
   }
 
+  const AstRawString* PreParserIdentifierToAstRawString(
+      const PreParserIdentifier& arg) {
+    // This method definition is only needed due to an MSVC oddity that
+    // instantiates the method despite it being unused. See crbug.com/v8/12266 .
+    UNREACHABLE();
+  }
+
   IterationStatement* AsIterationStatement(BreakableStatement* s) {
     return s->AsIterationStatement();
   }