diff --git a/src/args.rs b/src/args.rs
index 939b3b7..c3e6b9f 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -35,7 +35,7 @@ where
                  .multiple(true)
                  .required(true))
         .arg(Arg::with_name("extensions")
-                 .help("Comma-separated list of file extensions to watch (js,css,html)")
+                 .help("Comma-separated list of file extensions to watch (e.g. js,css,html)")
                  .short("e")
                  .long("exts")
                  .takes_value(true))
@@ -51,7 +51,8 @@ where
                  .short("c")
                  .long("clear"))
         .arg(Arg::with_name("on-busy-update")
-                 .help("Select the behaviour to use when receiving events while the command is running. Current default is queue, will change to do-nothing in 2.0")
+                 .help("Select the behaviour to use when receiving events while the command is running. Current default is queue, will change to do-nothing in 2.0.")
+                 .takes_value(true)
                  .possible_values(&["do-nothing", "queue", "restart", "signal"])
                  .long("on-busy-update"))
         .arg(Arg::with_name("restart")