diff --git a/crates/ruff_python_ast/src/nodes.rs b/crates/ruff_python_ast/src/nodes.rs
index 17d7797193..c2676da825 100644
--- a/crates/ruff_python_ast/src/nodes.rs
+++ b/crates/ruff_python_ast/src/nodes.rs
@@ -4061,7 +4061,7 @@ impl Ranged for Identifier {
     }
 }
 
-#[derive(Clone, Debug, PartialEq)]
+#[derive(Clone, Copy, Debug, PartialEq)]
 pub enum Singleton {
     None,
     True,
diff --git a/crates/ruff_python_codegen/src/generator.rs b/crates/ruff_python_codegen/src/generator.rs
index 68b4ff6064..a937130809 100644
--- a/crates/ruff_python_codegen/src/generator.rs
+++ b/crates/ruff_python_codegen/src/generator.rs
@@ -669,7 +669,7 @@ impl<'a> Generator<'a> {
                 self.unparse_expr(value, precedence::MAX);
             }
             Pattern::MatchSingleton(ast::PatternMatchSingleton { value, range: _ }) => {
-                self.unparse_singleton(value);
+                self.unparse_singleton(*value);
             }
             Pattern::MatchSequence(ast::PatternMatchSequence { patterns, range: _ }) => {
                 self.p("[");
@@ -1211,7 +1211,7 @@ impl<'a> Generator<'a> {
         }
     }
 
-    pub(crate) fn unparse_singleton(&mut self, singleton: &Singleton) {
+    pub(crate) fn unparse_singleton(&mut self, singleton: Singleton) {
         match singleton {
             Singleton::None => self.p("None"),
             Singleton::True => self.p("True"),