diff --git a/Gir.toml b/Gir.toml
index ca817bee..90c2a2e8 100644
--- a/Gir.toml
+++ b/Gir.toml
@@ -582,9 +582,6 @@ status = "generate"
     [[object.function]]
     name = "communicate_utf8_async"
     ignore = true
-    [[object.function]]
-    name = "communicate_utf8_async_future"
-    ignore = true
 
 [[object]]
 name = "Gio.SubprocessLauncher"
diff --git a/src/subprocess.rs b/src/subprocess.rs
index a9c88e1c..a985af76 100644
--- a/src/subprocess.rs
+++ b/src/subprocess.rs
@@ -4,13 +4,24 @@ use Subprocess;
 use Cancellable;
 #[cfg(any(feature = "v2_40", feature = "dox"))]
 use Error;
+#[cfg(any(feature = "v2_40", feature = "dox"))]
 use ffi;
+#[cfg(any(feature = "v2_40", feature = "dox"))]
 use glib;
+#[cfg(any(feature = "v2_40", feature = "dox"))]
 use glib::object::IsA;
+#[cfg(any(feature = "v2_40", feature = "dox"))]
 use glib::translate::*;
+#[cfg(any(feature = "v2_40", feature = "dox"))]
 use glib_ffi;
+#[cfg(any(feature = "v2_40", feature = "dox"))]
 use gobject_ffi;
+#[cfg(any(feature = "v2_40", feature = "dox"))]
 use std::ptr;
+#[cfg(feature = "futures")]
+use futures_core;
+#[cfg(feature = "futures")]
+use std::boxed::Box as Box_;
 
 pub trait SubprocessExtManual {
     #[cfg(any(feature = "v2_40", feature = "dox"))]
@@ -18,7 +29,8 @@ pub trait SubprocessExtManual {
 
     #[cfg(feature = "futures")]
     #[cfg(any(feature = "v2_40", feature = "dox"))]
-    fn communicate_utf8_async_future<P: Into<Option<String>>>(&self, stdin_buf: P) -> Box_<futures_core::Future<Item = (Self, (String, String)), Error = (Self, Error)>>;
+    fn communicate_utf8_async_future<P: Into<Option<String>>>(&self, stdin_buf: P) -> Box_<futures_core::Future<Item = (Self, (String, String)), Error = (Self, Error)>>
+        where Self: Sized;
 }
 
 #[cfg(any(feature = "v2_40", feature = "dox"))]
@@ -26,10 +38,10 @@ impl<O: IsA<Subprocess> + IsA<glib::object::Object> + Clone + 'static> Subproces
     #[cfg(any(feature = "v2_40", feature = "dox"))]
     fn communicate_utf8_async<'a, P: Into<Option<String>>, Q: Into<Option<&'a Cancellable>>, R: FnOnce(Result<(String, String), Error>) + Send + 'static>(&self, stdin_buf: P, cancellable: Q, callback: R) {
         let stdin_buf = stdin_buf.into();
-        let stdin_buf = stdin_buf.to_glib_none();
+        let stdin_buf = stdin_buf.to_glib_full();
         let cancellable = cancellable.into();
         let cancellable = cancellable.to_glib_none();
-        let user_data: Box<Box<(R, *mut i8)>> = Box::new(Box::new((callback, stdin_buf.0)));
+        let user_data: Box<Box<(R, *mut i8)>> = Box::new(Box::new((callback, stdin_buf)));
         unsafe extern "C" fn communicate_utf8_async_trampoline<R: FnOnce(Result<(String, String), Error>) + Send + 'static>(_source_object: *mut gobject_ffi::GObject, res: *mut ffi::GAsyncResult, user_data: glib_ffi::gpointer)
         {
             callback_guard!();
@@ -44,24 +56,24 @@ impl<O: IsA<Subprocess> + IsA<glib::object::Object> + Clone + 'static> Subproces
         }
         let callback = communicate_utf8_async_trampoline::<R>;
         unsafe {
-            ffi::g_subprocess_communicate_utf8_async(self.to_glib_none().0, stdin_buf.0, cancellable.0, Some(callback), Box::into_raw(user_data) as *mut _);
+            ffi::g_subprocess_communicate_utf8_async(self.to_glib_none().0, stdin_buf, cancellable.0, Some(callback), Box::into_raw(user_data) as *mut _);
         }
     }
 
     #[cfg(feature = "futures")]
     #[cfg(any(feature = "v2_40", feature = "dox"))]
-    fn communicate_utf8_async_future<P: Into<Option<String>>>(&self, stdin_buf: P) -> Box_<futures_core::Future<Item = (Self, (String, String)), Error = (Self, Error)>> {
+    fn communicate_utf8_async_future<P: Into<Option<String>>>(&self, stdin_buf: P) -> Box_<futures_core::Future<Item = (Self, (String, String)), Error = (Self, Error)>>
+        where Self: Sized {
         use GioFuture;
         use send_cell::SendCell;
 
         let stdin_buf = stdin_buf.into();
-        let stdin_buf = stdin_buf.map(ToOwned::to_owned);
         GioFuture::new(self, move |obj, send| {
             let cancellable = Cancellable::new();
             let send = SendCell::new(send);
             let obj_clone = SendCell::new(obj.clone());
             obj.communicate_utf8_async(
-                 stdin_buf.as_ref().map(::std::borrow::Borrow::borrow),
+                 stdin_buf,
                  Some(&cancellable),
                  move |res| {
                      let obj = obj_clone.into_inner();