diff --git a/src/graphics/oled_ui.rs b/src/graphics/oled_ui.rs
index a747690..fa893f5 100644
--- a/src/graphics/oled_ui.rs
+++ b/src/graphics/oled_ui.rs
@@ -134,7 +134,7 @@ const SENSOR_TRAY_SIZE: Size = Size::new(SENSOR_IMAGES.len() as u32 * (SENSOR_IC
 const SPEEDO_TRAY_SIZE: Size = Size::new(DISPLAY_SIZE.width - SENSOR_TRAY_SIZE.width, SENSOR_TRAY_SIZE.height);
 
 impl Screen {
-    pub fn draw_screen<'a, T>(&self, sampler: &mut EmbeddedGraphicsSampler<'a, T>, state: &OledUniforms) where T: Sample<'a, Matrix2DSpace>, T::Output: PixelSink<BinaryColor> {
+    pub fn draw_screen<'a, T>(&self, sampler: &mut EmbeddedGraphicsSampler<'a, T>, state: &OledUniforms) where T: Sample<'a, Matrix2DSpace>, T::Output: AdditivePixelSink<BinaryColor> {
         match self {
             Screen::Blank => (),
             Screen::Bootsplash => {
@@ -215,7 +215,7 @@ impl Screen {
     }
 }
 
-impl<HwPixel: PixelSink<BinaryColor>> RenderSource<OledUniforms, Matrix2DSpace, BinaryColor, HwPixel> for Screen {
+impl<HwPixel: AdditivePixelSink<BinaryColor>> RenderSource<OledUniforms, Matrix2DSpace, BinaryColor, HwPixel> for Screen {
     fn render_to<'a, Smp>(&'a self, output: &'a mut Smp, uniforms: &OledUniforms)
         where 
             Smp: Sample<'a, Matrix2DSpace, Output = HwPixel> {