diff --git a/src/main.rs b/src/main.rs
index 83ceb74..417e095 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -48,7 +48,7 @@ fn show_window ( application : & Application ) {
 
 				let ui = UI :: new (
 					window ,
-					|film_uuid| pinned_async ! {
+					async |film_uuid| {
 						data_manager . get_film_details (film_uuid) . await
 							. expect ("A film with the given UUID should exist")
 					} ,
diff --git a/src/ui/mod.rs b/src/ui/mod.rs
index d2ef8b1..c4fac8b 100644
--- a/src/ui/mod.rs
+++ b/src/ui/mod.rs
@@ -3,7 +3,6 @@ mod component ;
 mod utility ;
 
 use futures :: * ;
-use futures :: future :: * ;
 use gtk4 :: Orientation :: * ;
 use gtk4 :: prelude :: * ;
 use libadwaita :: * ;
@@ -27,7 +26,7 @@ pub struct UI {
 impl UI {
 	pub fn new (
 		window : & 'static Window ,
-		get_film_details : impl Fn (String) -> BoxFuture < 'static , FilmDetails > + 'static ,
+		get_film_details : impl AsyncFn (String) -> FilmDetails + 'static ,
 	) -> UI {
 		let get_film_details = leak (get_film_details) ;
 
diff --git a/src/utility.rs b/src/utility.rs
index b6ba4ec..a5d7323 100644
--- a/src/utility.rs
+++ b/src/utility.rs
@@ -20,19 +20,10 @@ pub fn leak_mut < 'l , Type > ( inner : Type ) -> & 'l mut Type {
 	Box :: leak ( Box :: new (inner) )
 }
 
-macro_rules ! pinned_async { (
-	$ ( $ async_expression : expr ) ; +
-) => {
-	Box :: pin ( async {
-		$ ( $ async_expression ) ; +
-	} )
-} }
-
 pub fn to_os_string ( value : impl Display + Sized ) -> OsString {
 	OsString :: from ( ToString :: to_string ( & value ) )
 }
 
 
 
-pub (crate) use concat_os_str ;
-pub (crate) use pinned_async ;
+# [ allow (unused_imports) ] pub (crate) use concat_os_str ;