diff --git a/types/command-line-commands/index.d.ts b/types/command-line-commands/index.d.ts
index ea8d66a8ea..cf69198dac 100644
--- a/types/command-line-commands/index.d.ts
+++ b/types/command-line-commands/index.d.ts
@@ -11,7 +11,7 @@
  * @returns {{ command: string, argv: string[] }}
  * @throws `INVALID_COMMAND` - user supplied a command not specified in `commands`.
  */
-declare function commandLineCommands(commands: (string | null)[], argv: string[]): { command: string | null, argv: string[] };
+declare function commandLineCommands(commands: (string | null)[], argv?: string[]): { command: string | null, argv: string[] };
 
 export = commandLineCommands;