diff --git a/common.gypi b/common.gypi
index 95176802398f9e..70006682bcbc48 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.3',
+    'v8_embedder_string': '-node.4',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/base/platform/platform-posix.cc b/deps/v8/src/base/platform/platform-posix.cc
index d37b6219d410a7..cb95c8635015af 100644
--- a/deps/v8/src/base/platform/platform-posix.cc
+++ b/deps/v8/src/base/platform/platform-posix.cc
@@ -618,26 +618,7 @@ void OS::FreeAddressSpaceReservation(AddressSpaceReservation reservation) {
 // Need to disable CFI_ICALL due to the indirect call to memfd_create.
 DISABLE_CFI_ICALL
 PlatformSharedMemoryHandle OS::CreateSharedMemoryHandleForTesting(size_t size) {
-#if V8_OS_LINUX && !V8_OS_ANDROID
-  // Use memfd_create if available, otherwise mkstemp.
-  using memfd_create_t = int (*)(const char*, unsigned int);
-  memfd_create_t memfd_create =
-      reinterpret_cast<memfd_create_t>(dlsym(RTLD_DEFAULT, "memfd_create"));
-  int fd = -1;
-  if (memfd_create) {
-    fd = memfd_create("V8MemFDForTesting", 0);
-  }
-  if (fd == -1) {
-    char filename[] = "/tmp/v8_tmp_file_for_testing_XXXXXX";
-    fd = mkstemp(filename);
-    if (fd != -1) CHECK_EQ(0, unlink(filename));
-  }
-  if (fd == -1) return kInvalidSharedMemoryHandle;
-  CHECK_EQ(0, ftruncate(fd, size));
-  return SharedMemoryHandleFromFileDescriptor(fd);
-#else
   return kInvalidSharedMemoryHandle;
-#endif
 }
 
 // static