diff --git a/src/sdk/output/rust.rs b/src/sdk/output/rust.rs
index 48bb5db..0124559 100644
--- a/src/sdk/output/rust.rs
+++ b/src/sdk/output/rust.rs
@@ -156,7 +156,7 @@ pub fn generate_class<W: Write>(class: &Class, _sdk: &Sdk, w: &mut W) -> anyhow:
     let name = class.rust_name();
 
     writeln!(w, "#[repr(transparent)]")?;
-    writeln!(w, "#[derive(Debug, Eq, PartialEq, Copy, Clone)]")?;
+    writeln!(w, "#[derive(Debug, Eq, PartialEq, Clone)]")?;
     if !is_class {
         writeln!(w, "pub struct {name}(UnsafeCell<[u8; {size}]>);")?;