diff --git a/tools/check-flagged-apis/src/com/android/checkflaggedapis/Main.kt b/tools/check-flagged-apis/src/com/android/checkflaggedapis/Main.kt
index 1d2440d..26d3c9c 100644
--- a/tools/check-flagged-apis/src/com/android/checkflaggedapis/Main.kt
+++ b/tools/check-flagged-apis/src/com/android/checkflaggedapis/Main.kt
@@ -26,6 +26,7 @@
 import com.android.tools.metalava.model.text.ApiFile
 import com.github.ajalt.clikt.core.CliktCommand
 import com.github.ajalt.clikt.core.ProgramResult
+import com.github.ajalt.clikt.core.subcommands
 import com.github.ajalt.clikt.parameters.options.help
 import com.github.ajalt.clikt.parameters.options.option
 import com.github.ajalt.clikt.parameters.options.required
@@ -141,6 +142,10 @@
   }
 }
 
+class MainCommand : CliktCommand() {
+  override fun run() {}
+}
+
 class CheckCommand :
     CliktCommand(
         help =
@@ -446,4 +451,4 @@
   return errors
 }
 
-fun main(args: Array<String>) = CheckCommand().main(args)
+fun main(args: Array<String>) = MainCommand().subcommands(CheckCommand()).main(args)