diff --git a/crates/uplc/src/ast.rs b/crates/uplc/src/ast.rs
index e9006e6b..97d84333 100644
--- a/crates/uplc/src/ast.rs
+++ b/crates/uplc/src/ast.rs
@@ -237,7 +237,7 @@ impl From<NamedDeBruijn> for FakeNamedDeBruijn {
 }
 
 /// Represents a debruijn index.
-#[derive(Debug, Clone, PartialEq, Copy)]
+#[derive(Debug, Clone, PartialEq, Eq, Copy)]
 pub struct DeBruijn(usize);
 
 impl DeBruijn {
diff --git a/crates/uplc/src/builtins.rs b/crates/uplc/src/builtins.rs
index 4f545c52..acf187d6 100644
--- a/crates/uplc/src/builtins.rs
+++ b/crates/uplc/src/builtins.rs
@@ -5,7 +5,7 @@ use flat_rs::de;
 /// All the possible builtin functions in Untyped Plutus Core.
 #[repr(u8)]
 #[allow(non_camel_case_types)]
-#[derive(Debug, Clone, PartialEq, Copy)]
+#[derive(Debug, Clone, PartialEq, Eq, Copy)]
 pub enum DefaultFunction {
     // Integer functions
     AddInteger = 0,
diff --git a/crates/uplc/src/machine/cost_model.rs b/crates/uplc/src/machine/cost_model.rs
index e44c9058..1b2f4f90 100644
--- a/crates/uplc/src/machine/cost_model.rs
+++ b/crates/uplc/src/machine/cost_model.rs
@@ -3,7 +3,7 @@ use crate::builtins::DefaultFunction;
 use super::Value;
 
 /// Can be negative
-#[derive(Debug, Clone, PartialEq, Copy)]
+#[derive(Debug, Clone, PartialEq, Eq, Copy)]
 pub struct ExBudget {
     pub mem: i64,
     pub cpu: i64,