diff --git a/src/rustup-cli/rustup_mode.rs b/src/rustup-cli/rustup_mode.rs
index 3b67d5a19f4..5cd97d22654 100644
--- a/src/rustup-cli/rustup_mode.rs
+++ b/src/rustup-cli/rustup_mode.rs
@@ -304,6 +304,7 @@ pub fn cli() -> App<'static, 'static> {
             .arg(Arg::with_name("command")
                 .required(true)))
         .subcommand(SubCommand::with_name("doc")
+            .alias("docs")
             .about("Open the documentation for the current toolchain")
             .after_help(DOC_HELP)
             .arg(Arg::with_name("book")