diff --git a/src/bin/bat/clap_app.rs b/src/bin/bat/clap_app.rs
index b2ebb6f7..87cb2a65 100644
--- a/src/bin/bat/clap_app.rs
+++ b/src/bin/bat/clap_app.rs
@@ -480,6 +480,7 @@ pub fn build_app(interactive_output: bool) -> ClapApp<'static, 'static> {
         .arg(
             Arg::with_name("diagnostic")
                 .long("diagnostic")
+                .alias("diagnostics")
                 .hidden_short_help(true)
                 .help("Show diagnostic information for bug reports.")
         )