diff --git a/members/diesel-demo/src/main.rs b/members/diesel-demo/src/main.rs
index 32b1f93..7df25a4 100644
--- a/members/diesel-demo/src/main.rs
+++ b/members/diesel-demo/src/main.rs
@@ -41,7 +41,7 @@ fn repl(conn: &mut SqliteConnection) -> anyhow::Result<()> {
     loop {
         lib::read_buf_interactive(&mut buf)?;
         buf = buf.to_uppercase();
-        if buf.starts_with("HELP") || buf.starts_with("?") {
+        if buf.starts_with("HELP") || buf.starts_with('?') {
             println!("{}", HELP_TEXT.bright_blue())
         } else if buf.starts_with("EXIT") || buf.is_empty() {
             break;