diff --git a/examples/nop-preprocessor.rs b/examples/nop-preprocessor.rs
index bbb82a46..f194991a 100644
--- a/examples/nop-preprocessor.rs
+++ b/examples/nop-preprocessor.rs
@@ -26,7 +26,7 @@ fn main() {
     if let Some(sub_args) = matches.subcommand_matches("supports") {
         handle_supports(&preprocessor, sub_args);
     } else if let Err(e) = handle_preprocessing(&preprocessor) {
-        eprintln!("{e}");
+        eprintln!("{e:?}");
         process::exit(1);
     }
 }