diff --git a/day03/src/main.rs b/day03/src/main.rs
index b565993..b5b13ee 100644
--- a/day03/src/main.rs
+++ b/day03/src/main.rs
@@ -11,7 +11,7 @@ fn main() {
     println!("{}", pt2(&input));
 }
 
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Debug, PartialEq, Eq, Clone, Copy)]
 enum Inst {
     Mul(i64, i64),
     Do,
@@ -56,13 +56,11 @@ fn parse_mul(input: &mut &str) -> PResult<Inst> {
 }
 
 fn parse_do(input: &mut &str) -> PResult<Inst> {
-    let _ = "do()".parse_next(input)?;
-    Ok(Inst::Do)
+    "do()".value(Inst::Do).parse_next(input)
 }
 
 fn parse_dont(input: &mut &str) -> PResult<Inst> {
-    let _ = "don't()".parse_next(input)?;
-    Ok(Inst::Dont)
+    "don't()".value(Inst::Dont).parse_next(input)
 }
 
 fn parse_inst(input: &mut &str) -> PResult<Inst> {