diff --git a/src/mapped.rs b/src/mapped.rs
index 83491c1..c94b919 100644
--- a/src/mapped.rs
+++ b/src/mapped.rs
@@ -1,4 +1,8 @@
-use std::mem::{align_of, size_of};
+use std::{
+    mem::{align_of, size_of},
+    ops::Deref,
+    sync::Arc,
+};
 
 use zerocopy::{FromBytes, FromZeroes, Ref};
 
@@ -20,3 +24,12 @@ pub trait ReaderTrait {
             .into_ref()
     }
 }
+
+impl<T> ReaderTrait for Arc<T>
+where
+    T: ReaderTrait,
+{
+    fn read_raw(&self, range: FileRange) -> &[u8] {
+        self.deref().read_raw(range)
+    }
+}