diff --git a/common.gypi b/common.gypi
index 154ba97d9f46cf..a3f155fde2861a 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.20',
+    'v8_embedder_string': '-node.21',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/base/page-allocator.cc b/deps/v8/src/base/page-allocator.cc
index 62dfc94a83be07..9f48ee79fe5424 100644
--- a/deps/v8/src/base/page-allocator.cc
+++ b/deps/v8/src/base/page-allocator.cc
@@ -6,6 +6,10 @@
 
 #include "src/base/platform/platform.h"
 
+#if V8_OS_MACOSX
+#include <sys/mman.h>  // For MAP_JIT.
+#endif
+
 namespace v8 {
 namespace base {