diff --git a/common.gypi b/common.gypi
index 4b2d46efd2a213..7dea2696d2bc40 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.11',
+    'v8_embedder_string': '-node.12',
 
     ##### V8 defaults for Node.js #####
 
diff --git a/deps/v8/src/maglev/maglev-code-generator.cc b/deps/v8/src/maglev/maglev-code-generator.cc
index 27c4d0ee25e056..3eb18746ad461a 100644
--- a/deps/v8/src/maglev/maglev-code-generator.cc
+++ b/deps/v8/src/maglev/maglev-code-generator.cc
@@ -419,7 +419,11 @@ class ParallelMoveResolver {
   void EmitMovesFromSource(RegisterT source_reg, GapMoveTargets&& targets) {
     DCHECK(moves_from_register_[source_reg.code()].is_empty());
     if constexpr (DecompressIfNeeded) {
-      static_assert(COMPRESS_POINTERS_BOOL);
+      // The DecompressIfNeeded clause is redundant with the if-constexpr above,
+      // but otherwise this code cannot be compiled by compilers not yet
+      // implementing CWG2518.
+      static_assert(DecompressIfNeeded && COMPRESS_POINTERS_BOOL);
+
       if (targets.needs_decompression == kNeedsDecompression) {
         __ DecompressTagged(source_reg, source_reg);
       }
@@ -462,7 +466,11 @@ class ParallelMoveResolver {
     // Decompress after the first move, subsequent moves reuse this register so
     // they're guaranteed to be decompressed.
     if constexpr (DecompressIfNeeded) {
-      static_assert(COMPRESS_POINTERS_BOOL);
+      // The DecompressIfNeeded clause is redundant with the if-constexpr above,
+      // but otherwise this code cannot be compiled by compilers not yet
+      // implementing CWG2518.
+      static_assert(DecompressIfNeeded && COMPRESS_POINTERS_BOOL);
+
       if (targets.needs_decompression == kNeedsDecompression) {
         __ DecompressTagged(register_with_slot_value, register_with_slot_value);
         targets.needs_decompression = kDoesNotNeedDecompression;