diff --git a/src/lib.rs b/src/lib.rs
index b576aae..d8d23e7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -788,6 +788,7 @@
         App::new("fargo")
             .version("v0.2.0")
             .setting(AppSettings::GlobalVersion)
+            .setting(AppSettings::ArgRequiredElseHelp)
             .about("Fargo is a prototype Fuchsia-specific wrapper around Cargo")
             .arg(
                 Arg::with_name("verbose")