diff --git a/src/xenia/app/xenia_main.cc b/src/xenia/app/xenia_main.cc
index 2597fc02f..98dcbf4f4 100644
--- a/src/xenia/app/xenia_main.cc
+++ b/src/xenia/app/xenia_main.cc
@@ -37,6 +37,8 @@
 #include "xenia/hid/xinput/xinput_hid.h"
 #endif  // XE_PLATFORM_WIN32
 
+#include "third_party/xbyak/xbyak/xbyak_util.h"
+
 DEFINE_string(apu, "any", "Audio system. Use: [any, nop, xaudio2]");
 DEFINE_string(gpu, "any", "Graphics system. Use: [any, vulkan, null]");
 DEFINE_string(hid, "any", "Input system. Use: [any, nop, winkey, xinput]");
@@ -138,6 +140,14 @@ int xenia_main(const std::vector<std::wstring>& args) {
   Profiler::Initialize();
   Profiler::ThreadEnter("main");
 
+  Xbyak::util::Cpu cpu;
+  if (!cpu.has(Xbyak::util::Cpu::tAVX)) {
+    xe::FatalError(
+        "Your CPU is too old to support Xenia. See the FAQ for system "
+        "requirements at https://xenia.jp");
+    return -1;
+  }
+
   // Figure out where content should go.
   std::wstring content_root;
   if (!FLAGS_content_root.empty()) {