diff --git a/src/imageops/sample.rs b/src/imageops/sample.rs
index fa8043a20e..34e11704b5 100644
--- a/src/imageops/sample.rs
+++ b/src/imageops/sample.rs
@@ -78,7 +78,7 @@ use crate::{ImageBuffer, Rgba32FImage};
 ///     <td>1170 ms</td>
 ///   </tr>
 /// </table>
-#[derive(Clone, Copy, Debug, PartialEq, Hash)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub enum FilterType {
     /// Nearest Neighbor
     Nearest,