--- a/deps/v8/src/compiler/backend/instruction-selector.cc
+++ b/deps/v8/src/compiler/backend/instruction-selector.cc
@@ -2808,7 +2808,7 @@
   switch (call_descriptor->kind()) {
     case CallDescriptor::kCallAddress: {
       int misc_field = static_cast<int>(call_descriptor->ParameterCount());
-#if defined(_AIX)
+#if ABI_USES_FUNCTION_DESCRIPTORS
       // Highest misc_field bit is used on AIX to indicate if a CFunction call
       // has function descriptor or not.
       if (!call_descriptor->NoFunctionDescriptor()) {
--- a/deps/v8/src/compiler/backend/ppc/code-generator-ppc.cc
+++ b/deps/v8/src/compiler/backend/ppc/code-generator-ppc.cc
@@ -1039,7 +1039,7 @@
           linkage()->GetIncomingDescriptor()->IsWasmCapiFunction();
       int offset = (FLAG_enable_embedded_constant_pool ? 20 : 23) * kInstrSize;
 
-#if defined(_AIX)
+#if ABI_USES_FUNCTION_DESCRIPTORS
       // AIX/PPC64BE Linux uses a function descriptor
       int kNumParametersMask = kHasFunctionDescriptorBitMask - 1;
       num_parameters = kNumParametersMask & misc_field;
--- a/deps/v8/src/execution/simulator.h
+++ b/deps/v8/src/execution/simulator.h
@@ -128,7 +128,7 @@
 #if defined(V8_TARGET_OS_WIN) && !defined(V8_OS_WIN)
     FATAL("Generated code execution not possible during cross-compilation.");
 #endif  // defined(V8_TARGET_OS_WIN) && !defined(V8_OS_WIN)
-#if V8_OS_AIX
+#if ABI_USES_FUNCTION_DESCRIPTORS
     // AIX ABI requires function descriptors (FD).  Artificially create a pseudo
     // FD to ensure correct dispatch to generated code.  The 'volatile'
     // declaration is required to avoid the compiler from not observing the