diff --git a/src/lib.rs b/src/lib.rs
index a86aa9e5bdd5..cd9e19171db4 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -521,6 +521,7 @@ pub fn format_input<T: Write>(
     let silent_emitter = Box::new(EmitterWriter::new(
         Box::new(Vec::new()),
         Some(codemap.clone()),
+        false,
     ));
     parse_session.span_diagnostic = Handler::with_emitter(true, false, silent_emitter);