diff --git a/lib/src/processor/memory/mmio/gpu.rs b/lib/src/processor/memory/mmio/gpu.rs
index 5734e28..be64f2c 100644
--- a/lib/src/processor/memory/mmio/gpu.rs
+++ b/lib/src/processor/memory/mmio/gpu.rs
@@ -23,7 +23,11 @@ mod types;
 const TILE_WINDOW_WIDTH: usize = 16 * 8;
 const TILE_WINDOW_HEIGHT: usize = 24 * 8;
 
-pub struct Gpu<ColourFormat: From<Colour>, R: Renderer<ColourFormat>> {
+pub struct Gpu<ColourFormat, R>
+where
+    ColourFormat: From<Colour> + Clone,
+    R: Renderer<ColourFormat>,
+{
     pub buffer: Vec<ColourFormat>,
     pub vram: Vram,
     pub oam: Oam,
@@ -48,7 +52,11 @@ pub struct Gpu<ColourFormat: From<Colour>, R: Renderer<ColourFormat>> {
 }
 
 #[derive(Serialize, Deserialize)]
-pub struct GpuSaveState<ColourFormat: From<Colour>, R: Renderer<ColourFormat>> {
+pub struct GpuSaveState<ColourFormat, R>
+where
+    ColourFormat: From<Colour> + Clone,
+    R: Renderer<ColourFormat>,
+{
     buffer: Vec<ColourFormat>,
     vram: Vram,
     oam: Oam,
diff --git a/lib/src/processor/memory/mmio/gpu/addresses.rs b/lib/src/processor/memory/mmio/gpu/addresses.rs
index d38e730..b51a373 100644
--- a/lib/src/processor/memory/mmio/gpu/addresses.rs
+++ b/lib/src/processor/memory/mmio/gpu/addresses.rs
@@ -8,7 +8,11 @@ use super::{
     Colour, Gpu,
 };
 
-impl<Format: From<Colour>, R: Renderer<Format>> Gpu<Format, R> {
+impl<ColourFormat, R> Gpu<ColourFormat, R>
+where
+    ColourFormat: From<Colour> + Clone,
+    R: Renderer<ColourFormat>,
+{
     pub fn update_lcdc(&mut self, data: u8) {
         self.lcdc.enable = get_bit(data, 7);
         self.lcdc.window_tilemap = if get_bit(data, 6) {
diff --git a/lib/src/processor/memory/mmio/gpu/tile_window.rs b/lib/src/processor/memory/mmio/gpu/tile_window.rs
index 1c6bed0..03cdbdc 100644
--- a/lib/src/processor/memory/mmio/gpu/tile_window.rs
+++ b/lib/src/processor/memory/mmio/gpu/tile_window.rs
@@ -6,18 +6,23 @@ use crate::{
 
 use super::{types::Vram, Colour};
 
-pub(super) struct TileWindow<Format: From<Colour>, R: Renderer<Format>> {
-    sprite_buffer: Vec<Format>,
+pub(super) struct TileWindow<ColourFormat, R>
+where
+    ColourFormat: From<Colour> + Clone,
+    R: Renderer<ColourFormat>,
+{
+    sprite_buffer: Vec<ColourFormat>,
     sprite_renderer: R,
 }
 
-impl<Format: From<Colour>, R: Renderer<Format>> TileWindow<Format, R> {
+impl<ColourFormat, R> TileWindow<ColourFormat, R>
+where
+    ColourFormat: From<Colour> + Clone,
+    R: Renderer<ColourFormat>,
+{
     pub(super) fn new(window: R) -> Self {
-        let mut sprite_buffer = Vec::new();
-        sprite_buffer.reserve_exact(TILE_WINDOW_WIDTH * TILE_WINDOW_HEIGHT);
-
         Self {
-            sprite_buffer,
+            sprite_buffer: vec![Colour::Error.into(); TILE_WINDOW_WIDTH * TILE_WINDOW_HEIGHT],
             sprite_renderer: window,
         }
     }