diff --git a/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h b/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h
--- a/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h
+++ b/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.h
@@ -24,6 +24,7 @@
     MachineArm = 0x1c0,
     MachineArmNt = 0x1c4,
     MachineArm64 = 0xaa64,
+    MachineArm64X = 0xa64e,
     MachineEbc = 0xebc,
     MachineX86 = 0x14c,
     MachineIA64 = 0x200,
diff --git a/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp b/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
--- a/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
+++ b/lldb/source/Plugins/ObjectFile/PECOFF/ObjectFilePECOFF.cpp
@@ -343,6 +343,7 @@
     specs.Append(module_spec);
     break;
   case MachineArm64:
+  case MachineArm64X:
     spec.SetTriple("aarch64-pc-windows");
     spec.GetTriple().setEnvironment(env);
     specs.Append(module_spec);