--- a/gfx/webrender_bindings/src/moz2d_renderer.rs
+++ b/gfx/webrender_bindings/src/moz2d_renderer.rs
@@ -26,17 +26,17 @@ fn option_to_nullable<T>(option: &Option
     }
 }
 
 impl BlobImageRenderer for Moz2dImageRenderer {
     fn add(&mut self, key: ImageKey, data: BlobImageData, tiling: Option<TileSize>) {
         self.blob_commands.insert(key, (Arc::new(data), tiling));
     }
 
-    fn update(&mut self, key: ImageKey, data: BlobImageData) {
+    fn update(&mut self, key: ImageKey, data: BlobImageData, _dirty_rect: Option<DeviceUintRect>) {
         let entry = self.blob_commands.get_mut(&key).unwrap();
         entry.0 = Arc::new(data);
     }
 
     fn delete(&mut self, key: ImageKey) {
         self.blob_commands.remove(&key);
     }