diff --git a/contracts/token/fungible/src/fungible.rs b/contracts/token/fungible/src/fungible.rs
index 82c23fe..b522230 100644
--- a/contracts/token/fungible/src/fungible.rs
+++ b/contracts/token/fungible/src/fungible.rs
@@ -178,6 +178,7 @@ pub trait FungibleToken {
 // ################## ERRORS ##################
 
 #[contracterror]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
 #[repr(u32)]
 pub enum FungibleTokenError {
     /// Indicates an error related to the current balance of account from which
diff --git a/contracts/utils/pausable/src/pausable.rs b/contracts/utils/pausable/src/pausable.rs
index c918127..2eff63d 100644
--- a/contracts/utils/pausable/src/pausable.rs
+++ b/contracts/utils/pausable/src/pausable.rs
@@ -61,6 +61,7 @@ pub trait Pausable {
 // ################## ERRORS ##################
 
 #[contracterror]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
 #[repr(u32)]
 pub enum PausableError {
     /// The operation failed because the contract is paused.
diff --git a/examples/fungible-pausable/src/contract.rs b/examples/fungible-pausable/src/contract.rs
index 240d3d2..22eb9e8 100644
--- a/examples/fungible-pausable/src/contract.rs
+++ b/examples/fungible-pausable/src/contract.rs
@@ -25,6 +25,8 @@ pub const OWNER: Symbol = symbol_short!("OWNER");
 pub struct ExampleContract;
 
 #[contracterror]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
+#[repr(u32)]
 pub enum ExampleContractError {
     Unauthorized = 1,
 }
diff --git a/examples/fungible-pausable/src/contract_token_interface.rs b/examples/fungible-pausable/src/contract_token_interface.rs
index 5ba978f..12f6d2d 100644
--- a/examples/fungible-pausable/src/contract_token_interface.rs
+++ b/examples/fungible-pausable/src/contract_token_interface.rs
@@ -25,6 +25,8 @@ pub const OWNER: Symbol = symbol_short!("OWNER");
 pub struct ExampleContract;
 
 #[contracterror]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
+#[repr(u32)]
 pub enum ExampleContractError {
     Unauthorized = 1,
 }
diff --git a/examples/pausable/src/contract.rs b/examples/pausable/src/contract.rs
index 2301169..51a39ee 100644
--- a/examples/pausable/src/contract.rs
+++ b/examples/pausable/src/contract.rs
@@ -20,6 +20,8 @@ pub enum DataKey {
 }
 
 #[contracterror]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, PartialOrd, Ord)]
+#[repr(u32)]
 pub enum ExampleContractError {
     Unauthorized = 1,
 }