diff --git a/src/parser/mod.rs b/src/parser/mod.rs
index ab16dfb8a..9ebc9300b 100644
--- a/src/parser/mod.rs
+++ b/src/parser/mod.rs
@@ -2272,6 +2272,7 @@ impl<'a> Parser<'a> {
 
     /// If the current token is the `expected` keyword, consume it and returns
     /// true. Otherwise, no tokens are consumed and returns false [must_use].
+    #[must_use]
     pub fn parse_keyword(&mut self, expected: Keyword) -> bool {
         match self.peek_token().token {
             Token::Word(w) if expected == w.keyword => {