diff --git a/lib/usage.ts b/lib/usage.ts
index 1426c4337..9374d2d16 100644
--- a/lib/usage.ts
+++ b/lib/usage.ts
@@ -246,8 +246,10 @@ export function usage(yargs: YargsInstance, shim: PlatformShim) {
         commands = commands.sort((a, b) => a[0].localeCompare(b[0]));
       }
 
+      const prefix = base$0 ? `${base$0} ` : '';
+
       commands.forEach(command => {
-        const commandString = `${base$0} ${parentCommands}${command[0].replace(
+        const commandString = `${prefix}${parentCommands}${command[0].replace(
           /^\$0 ?/,
           ''
         )}`; // drop $0 from default commands.