diff --git a/src/lib.rs b/src/lib.rs
index eb43d53..075abaa 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -171,10 +171,6 @@ impl DoubleFrame<NoPartialWindow> {
             partial_window: NoPartialWindow,
         }
     }
-
-    pub fn draw_pixel(&mut self, x: usize, y: usize, colour: PixelColour) {
-        todo!()
-    }
 }
 
 impl DoubleFrame<AutomaticPartialWindow> {
@@ -192,6 +188,12 @@ impl DoubleFrame<AutomaticPartialWindow> {
     }
 }
 
+impl<PartialWindow: ApplyPartialWindow> DoubleFrame<PartialWindow> {
+    pub fn draw_pixel(&mut self, x: u16, y: u16, colour: PixelColour) {
+        todo!()
+    }
+}
+
 impl<BusyPin: InputPin, ResetPin: OutputPin, DcPin: OutputPin, Spi: SpiDevice, Delay: DelayNs>
     EPaperDisplay<BusyPin, ResetPin, DcPin, Spi, Delay>
 {