diff --git a/libafl/src/observers/cmp.rs b/libafl/src/observers/cmp.rs
index de885874d6..34dfc67f84 100644
--- a/libafl/src/observers/cmp.rs
+++ b/libafl/src/observers/cmp.rs
@@ -16,7 +16,7 @@ use crate::{
 };
 
 /// Compare values collected during a run
-#[derive(Eq, PartialEq, Debug, Serialize, Deserialize)]
+#[derive(Eq, PartialEq, Debug, Serialize, Deserialize, Clone)]
 pub enum CmpValues {
     /// Two u8 values
     U8((u8, u8)),