diff --git a/common.gypi b/common.gypi
index 73695cac679..5586cbce856 100644
--- a/common.gypi
+++ b/common.gypi
@@ -44,7 +44,7 @@
 
     # 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.7',
+    'v8_embedder_string': '-node.8',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/include/v8-internal.h b/deps/v8/include/v8-internal.h
index 121dfc8e33f..fd8fcda6f5e 100644
--- a/deps/v8/include/v8-internal.h
+++ b/deps/v8/include/v8-internal.h
@@ -532,7 +532,7 @@ struct TagRange {
 
   // Construct the inclusive tag range [first, last].
   constexpr TagRange(Tag first, Tag last) : first(first), last(last) {
-#ifdef V8_ENABLE_CHECKS
+#if defined(V8_ENABLE_CHECKS) && V8_HAS_BUILTIN_UNREACHABLE
     // This would typically be a DCHECK, but that's not available here.
     if (first > last) __builtin_unreachable();  // Invalid tag range.
 #endif