diff --git a/arch/src/x86_64/mod.rs b/arch/src/x86_64/mod.rs
index dcceccd64..b16bca3d1 100644
--- a/arch/src/x86_64/mod.rs
+++ b/arch/src/x86_64/mod.rs
@@ -190,7 +190,7 @@ pub fn get_max_x2apic_id(topology: (u16, u16, u16, u16)) -> u32 {
     )
 }
 
-#[derive(Copy, Clone, Debug)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, serde::Deserialize, serde::Serialize)]
 pub enum CpuidReg {
     EAX,
     EBX,