diff --git a/crates/fj-kernel/src/stores/handle.rs b/crates/fj-kernel/src/stores/handle.rs
index 5aab0ed23..a86263ff8 100644
--- a/crates/fj-kernel/src/stores/handle.rs
+++ b/crates/fj-kernel/src/stores/handle.rs
@@ -157,9 +157,16 @@ unsafe impl<T> Sync for Handle<T> {}
 /// Represents the ID of an object
 ///
 /// See [`Handle::id`].
-#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash, Ord, PartialOrd)]
+#[derive(Clone, Copy, Eq, PartialEq, Hash, Ord, PartialOrd)]
 pub struct ObjectId(u64);
 
+impl fmt::Debug for ObjectId {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let id = self.0;
+        write!(f, "object id {id:#x}")
+    }
+}
+
 /// A wrapper around [`Handle`] to define equality based on identity
 ///
 /// This is a utility type that implements [`Eq`]/[`PartialEq`] and other common