diff --git a/src/buffers.rs b/src/buffers.rs
index b17dcd0..35bf116 100644
--- a/src/buffers.rs
+++ b/src/buffers.rs
@@ -95,7 +95,7 @@ impl Default for BoundSurface<Arc<Mutex<ShaderBinding>>> {
 
 #[cfg(feature="threads")]
 impl Surface for BoundSurface<Arc<Mutex<ShaderBinding>>> {
-    fn rect(&self) -> Rectangle<u8, Virtual> {
+    fn rect(&self) -> Rectangle<Virtual> {
         let r = self.binding.lock().unwrap();
         r.rect.clone()
     }
@@ -114,7 +114,7 @@ impl Surface for BoundSurface<Arc<Mutex<ShaderBinding>>> {
         self.binding.lock().unwrap().shader = None;
     }
 
-    fn set_rect(&mut self, rect: &Rectangle<u8, Virtual>) {
+    fn set_rect(&mut self, rect: &Rectangle<Virtual>) {
         self.binding.lock().unwrap().rect = rect.clone();
     }