diff --git a/tower-http/src/body.rs b/tower-http/src/body.rs
index 815a0d10..77c3473d 100644
--- a/tower-http/src/body.rs
+++ b/tower-http/src/body.rs
@@ -103,6 +103,12 @@ where
     }
 }
 
+impl<D, E> From<UnsyncBoxBody<D, E>> for http_body_util::combinators::UnsyncBoxBody<D, E> {
+    fn from(body: UnsyncBoxBody<D, E>) -> Self {
+        body.inner
+    }
+}
+
 impl<D, E> UnsyncBoxBody<D, E> {
     #[allow(dead_code)]
     pub(crate) fn new(inner: http_body_util::combinators::UnsyncBoxBody<D, E>) -> Self {
diff --git a/tower-http/src/services/fs/serve_dir/mod.rs b/tower-http/src/services/fs/serve_dir/mod.rs
index 61b956d1..02e3997d 100644
--- a/tower-http/src/services/fs/serve_dir/mod.rs
+++ b/tower-http/src/services/fs/serve_dir/mod.rs
@@ -493,6 +493,12 @@ opaque_body! {
     pub type ResponseBody = UnsyncBoxBody<Bytes, io::Error>;
 }
 
+impl From<ResponseBody> for http_body_util::combinators::UnsyncBoxBody<Bytes, io::Error> {
+    fn from(body: ResponseBody) -> Self {
+        body.inner.inner
+    }
+}
+
 /// The default fallback service used with [`ServeDir`].
 #[derive(Debug, Clone, Copy)]
 pub struct DefaultServeDirFallback(Infallible);