diff --git a/dust-lang/src/value/function.rs b/dust-lang/src/value/function.rs
index 08f9089..a8d6345 100644
--- a/dust-lang/src/value/function.rs
+++ b/dust-lang/src/value/function.rs
@@ -4,23 +4,13 @@ use crate::FunctionType;
 
 use super::DustString;
 
-#[derive(Clone, Debug, PartialEq, PartialOrd)]
+#[derive(Clone, Debug, Default, PartialEq, PartialOrd)]
 pub struct Function {
     pub name: Option<DustString>,
     pub r#type: FunctionType,
     pub prototype_index: u16,
 }
 
-impl Default for Function {
-    fn default() -> Self {
-        Self {
-            name: None,
-            r#type: FunctionType::default(),
-            prototype_index: 0,
-        }
-    }
-}
-
 impl Display for Function {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
         let mut type_string = self.r#type.to_string();
diff --git a/dust-lang/src/vm/action/mod.rs b/dust-lang/src/vm/action/mod.rs
index e23bc54..d83c08a 100644
--- a/dust-lang/src/vm/action/mod.rs
+++ b/dust-lang/src/vm/action/mod.rs
@@ -213,11 +213,15 @@ impl Action {
             Operation::MULTIPLY => multiply,
             Operation::DIVIDE => divide,
             Operation::MODULO => modulo,
+            Operation::NEGATE => negate,
+            Operation::NOT => not,
             Operation::EQUAL => equal,
             Operation::LESS => less,
             Operation::LESS_EQUAL => less_equal,
             Operation::TEST => test,
             Operation::TEST_SET => test_set,
+            Operation::CALL => call,
+            Operation::CALL_NATIVE => call_native,
             Operation::JUMP => jump,
             Operation::RETURN => r#return,
             _ => todo!(),
@@ -1320,19 +1324,19 @@ fn less_equal(
     }
 }
 
-fn negate(_: InstructionFields, _: &mut Thread, _: &mut PointerCache) {
+fn negate(_: &mut usize, _: InstructionFields, _: &mut Thread, _: &mut PointerCache) {
     todo!()
 }
 
-fn not(_: InstructionFields, _: &mut Thread, _: &mut PointerCache) {
+fn not(_: &mut usize, _: InstructionFields, _: &mut Thread, _: &mut PointerCache) {
     todo!()
 }
 
-fn call(_: InstructionFields, _: &mut Thread, _: &mut PointerCache) {
+fn call(_: &mut usize, _: InstructionFields, _: &mut Thread, _: &mut PointerCache) {
     todo!()
 }
 
-fn call_native(_: InstructionFields, _: &mut Thread, _: &mut PointerCache) {
+fn call_native(_: &mut usize, _: InstructionFields, _: &mut Thread, _: &mut PointerCache) {
     todo!()
 }