diff --git a/src/cli.rs b/src/cli.rs
index eb59c5fd..e6d6332f 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -69,7 +69,7 @@ pub fn build_cli() -> App<'static, 'static> {
                         .short("o")
                         .long("output-dir")
                         .takes_value(true)
-                        .help("Outputs the generated site in the given path (by default 'public' dir in project root)"),
+                        .help("Outputs assets of the generated site in the given path (by default 'public' dir in project root). HTML/XML will be stored in memory."),
                     Arg::with_name("base_url")
                         .short("u")
                         .long("base-url")