diff --git a/src/errors.rs b/src/errors.rs
index 83f4af16612..d7816e395c8 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -11,7 +11,7 @@ impl IntoDiagnosticArg for ExitCode {
         let ExitCode(exit_code) = self;
         match exit_code {
             Some(t) => t.into_diagnostic_arg(),
-            None => DiagnosticArgValue::Str(Cow::Borrowed("None")),
+            None => DiagnosticArgValue::Str(Cow::Borrowed("<signal>")),
         }
     }
 }