diff --git a/src/graphics/display.rs b/src/graphics/display.rs
index c2a6f7b..d604661 100644
--- a/src/graphics/display.rs
+++ b/src/graphics/display.rs
@@ -37,7 +37,7 @@ impl<T, Color: Default + Copy> BikeOutput<T, Color> {
     }
 }
 
-impl<'a, T: SmartLedsWrite + 'a> Output<'a, SegmentSpace> for BikeOutput<T, T::Color> where T::Color: AsMilliwatts + Copy + Fract8Ops + WithGamma + Default + Debug + 'a + 'static {
+impl<'a, T: SmartLedsWrite + 'a> Output<'a, SegmentSpace> for BikeOutput<T, T::Color> where T::Color: AsMilliwatts + Copy + Mul<Fract8, Output = T::Color> + WithGamma + Default + Debug + 'a + 'static {
     type Error = T::Error;
 
     type Controls = DisplayControls;