diff --git a/crates/libafl/src/observers/value.rs b/crates/libafl/src/observers/value.rs
index ff857ad43a..978e279bd9 100644
--- a/crates/libafl/src/observers/value.rs
+++ b/crates/libafl/src/observers/value.rs
@@ -14,7 +14,7 @@ use serde::{Deserialize, Serialize, de::DeserializeOwned};
 
 use crate::{
     Error,
-    observers::{MapObserver, Observer, ObserverWithHashField},
+    observers::{DifferentialObserver, MapObserver, Observer, ObserverWithHashField},
 };
 
 /// A simple observer with a single value.
@@ -80,6 +80,8 @@ impl<T: Hash> ObserverWithHashField for ValueObserver<'_, T> {
     }
 }
 
+impl<OTA, OTB, I, S, T> DifferentialObserver<OTA, OTB, I, S> for ValueObserver<'_, T> {}
+
 /// A simple observer with a single [`RefCell`]'d value.
 #[derive(Serialize, Deserialize, Debug)]
 #[expect(clippy::unsafe_derive_deserialize)]
@@ -159,6 +161,8 @@ where
     }
 }
 
+impl<OTA, OTB, I, S, T> DifferentialObserver<OTA, OTB, I, S> for RefCellValueObserver<'_, T> {}
+
 /// [`Iterator`] over [`RefCellValueObserver`] of a [`Deref`] to `[T]`.
 #[derive(Debug)]
 pub struct RefCellValueObserverIter<'it, T> {