diff --git a/compiler/parse/src/expr.rs b/compiler/parse/src/expr.rs
index e0908315ad..95c20325e9 100644
--- a/compiler/parse/src/expr.rs
+++ b/compiler/parse/src/expr.rs
@@ -668,7 +668,7 @@ pub fn assigned_pattern_field_to_pattern<'a>(
 /// The '=' used in a def can't be followed by another '=' (or else it's actually
 /// an "==") and also it can't be followed by '>' (or else it's actually an "=>")
 fn equals_for_def<'a>() -> impl Parser<'a, (), SyntaxError<'a>> {
-    |arena, state: State<'a>| match state.bytes.get(0) {
+    |_arena, state: State<'a>| match state.bytes.get(0) {
         Some(b'=') => match state.bytes.get(1) {
             Some(b'=') | Some(b'>') => Err((NoProgress, SyntaxError::ConditionFailed, state)),
             _ => {
@@ -1820,7 +1820,7 @@ pub fn ident_without_apply<'a>() -> impl Parser<'a, Expr<'a>, SyntaxError<'a>> {
 
 /// Like equals_for_def(), except it produces the indent_col of the state rather than ()
 pub fn equals_with_indent_help<'a>() -> impl Parser<'a, u16, EExpr<'a>> {
-    move |arena, state: State<'a>| {
+    move |_arena, state: State<'a>| {
         let equals = EExpr::Equals(state.line, state.column);
         let indent_col = state.indent_col;
 
diff --git a/compiler/parse/src/parser.rs b/compiler/parse/src/parser.rs
index 3d2441b1de..02e453b0f8 100644
--- a/compiler/parse/src/parser.rs
+++ b/compiler/parse/src/parser.rs
@@ -872,7 +872,7 @@ where
 }
 
 pub fn unexpected_eof<'a>(
-    arena: &'a Bump,
+    _arena: &'a Bump,
     state: State<'a>,
     chars_consumed: usize,
 ) -> (Progress, SyntaxError<'a>, State<'a>) {
@@ -1132,7 +1132,7 @@ pub fn ascii_string<'a>(keyword: &'static str) -> impl Parser<'a, (), SyntaxErro
     // the row in the state, only the column.
     debug_assert!(keyword.chars().all(|ch| ch.len_utf8() == 1 && ch != '\n'));
 
-    move |arena, state: State<'a>| {
+    move |_arena, state: State<'a>| {
         let len = keyword.len();
 
         // TODO do this comparison in one SIMD instruction (on supported systems)