diff --git a/library/core/src/fmt/mod.rs b/library/core/src/fmt/mod.rs
index 90c5719f486cb..8df415f80c4f6 100644
--- a/library/core/src/fmt/mod.rs
+++ b/library/core/src/fmt/mod.rs
@@ -20,7 +20,7 @@ mod num;
 
 #[stable(feature = "fmt_flags_align", since = "1.28.0")]
 /// Possible alignments returned by `Formatter::align`
-#[derive(Debug)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum Alignment {
     #[stable(feature = "fmt_flags_align", since = "1.28.0")]
     /// Indication that contents should be left-aligned.