diff --git a/common.gypi b/common.gypi
index 2e5c76e9b85561..a4dba6841cab3b 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/base/platform/platform.h b/deps/v8/src/base/platform/platform.h
index 6ad724db08e29a..d196578342f58b 100644
--- a/deps/v8/src/base/platform/platform.h
+++ b/deps/v8/src/base/platform/platform.h
@@ -47,7 +47,7 @@
 // And, intrin.h is a very expensive header that we want to avoid here, and
 // the cheaper intrin0.h is not available for all build configurations. That is
 // why we declare this intrinsic.
-unsigned long __readfsdword(unsigned long);  // NOLINT(runtime/int)
+extern "C" unsigned long __readfsdword(unsigned long);  // NOLINT(runtime/int)
 #endif                                       // V8_CC_MSVC && V8_HOST_ARCH_IA32
 #endif                                       // V8_NO_FAST_TLS