diff --git a/lib/src/container/store.rs b/lib/src/container/store.rs
index 49d2ca65..8a92ad0e 100644
--- a/lib/src/container/store.rs
+++ b/lib/src/container/store.rs
@@ -705,7 +705,7 @@ impl ImageImporter {
                     .await?;
             }
             let (blob, driver) = fetch_layer_decompress(
-                &mut self.proxy,
+                &self.proxy,
                 &self.proxy_img,
                 &import.manifest,
                 &layer.layer,
diff --git a/lib/src/container/unencapsulate.rs b/lib/src/container/unencapsulate.rs
index 55303e95..2f90e159 100644
--- a/lib/src/container/unencapsulate.rs
+++ b/lib/src/container/unencapsulate.rs
@@ -263,7 +263,7 @@ fn new_async_decompressor(
 
 /// A wrapper for [`get_blob`] which fetches a layer and decompresses it.
 pub(crate) async fn fetch_layer_decompress<'a>(
-    proxy: &'a mut ImageProxy,
+    proxy: &'a ImageProxy,
     img: &OpenedImage,
     manifest: &oci_image::ImageManifest,
     layer: &'a oci_image::Descriptor,