diff --git a/rpcs3/Emu/CPU/Hypervisor.h b/rpcs3/Emu/CPU/Hypervisor.h
index 32ccae961..49000bcd9 100644
--- a/rpcs3/Emu/CPU/Hypervisor.h
+++ b/rpcs3/Emu/CPU/Hypervisor.h
@@ -4,7 +4,7 @@
 
 namespace rpcs3
 {
-#if defined(ARCH_x64)
+#if defined(ARCH_X64)
 	union hypervisor_context_t
 	{
 		u64 regs[1];