diff --git a/src/parse/parser.rs b/src/parse/parser.rs
index cd5242c7a3..35fcbb7125 100644
--- a/src/parse/parser.rs
+++ b/src/parse/parser.rs
@@ -529,13 +529,7 @@ fn line_too_long(attempting: Attempting, state: State<'_>) -> (Fail, State<'_>)
 }
 
 /// A single char.
-#[cfg(not(debug_assertions))]
 pub fn char<'a>(expected: char) -> impl Parser<'a, ()> {
-    char_impl(expected)
-}
-
-#[inline(always)]
-pub fn char_impl<'a>(expected: char) -> impl Parser<'a, ()> {
     move |_arena, state: State<'a>| match state.input.chars().next() {
         Some(actual) if expected == actual => Ok(((), state.advance_without_indenting(1)?)),
         Some(other_ch) => Err(unexpected(other_ch, 0, state, Attempting::Keyword)),
@@ -544,13 +538,7 @@ pub fn char_impl<'a>(expected: char) -> impl Parser<'a, ()> {
 }
 
 /// A hardcoded keyword string with no newlines in it.
-#[cfg(not(debug_assertions))]
 pub fn string<'a>(keyword: &'static str) -> impl Parser<'a, ()> {
-    string_impl(keyword)
-}
-
-#[inline(always)]
-pub fn string_impl<'a>(keyword: &'static str) -> impl Parser<'a, ()> {
     // We can't have newlines because we don't attempt to advance the row
     // in the state, only the column.
     debug_assert!(!keyword.contains('\n'));
@@ -1445,16 +1433,6 @@ where
     BoxedParser::new(zero_or_more_impl(parser))
 }
 
-#[cfg(debug_assertions)]
-pub fn char<'a>(expected: char) -> BoxedParser<'a, ()> {
-    BoxedParser::new(char_impl(expected))
-}
-
-#[cfg(debug_assertions)]
-pub fn string<'a>(keyword: &'static str) -> BoxedParser<'a, ()> {
-    BoxedParser::new(string_impl(keyword))
-}
-
 #[cfg(debug_assertions)]
 pub fn either<'a, P1, P2, A, B>(p1: P1, p2: P2) -> BoxedParser<'a, Either<A, B>>
 where