diff --git a/src/bin/TurtleCtl.hx b/src/bin/TurtleCtl.hx
index 111e94e..32c237a 100644
--- a/src/bin/TurtleCtl.hx
+++ b/src/bin/TurtleCtl.hx
@@ -12,28 +12,28 @@ using tink.CoreApi;
 class TurtleCtl extends CLIAppBase {
 	public function new() {
 		registerAsyncSubcommand("f", (args) -> {
-			return asynPerform(Turtle.forward, args.getInt("times"));
-		}, [Int("times")]);
+			return asynPerform(Turtle.forward, args.getInt("times") ?? 1);
+		}, [Optional(Int("times"))]);
 
 		registerAsyncSubcommand("b", (args) -> {
-			return asynPerform(Turtle.back, args.getInt("times"));
-		}, [Int("times")]);
+			return asynPerform(Turtle.back, args.getInt("times") ?? 1);
+		}, [Optional(Int("times"))]);
 
 		registerAsyncSubcommand("l", (args) -> {
-			return asynPerform(Turtle.turnLeft, args.getInt("times"));
-		}, [Int("times")]);
+			return asynPerform(Turtle.turnLeft, args.getInt("times") ?? 1);
+		}, [Optional(Int("times"))]);
 
 		registerAsyncSubcommand("r", (args) -> {
-			return asynPerform(Turtle.turnRight, args.getInt("times"));
-		}, [Int("times")]);
+			return asynPerform(Turtle.turnRight, args.getInt("times") ?? 1);
+		}, [Optional(Int("times"))]);
 
 		registerAsyncSubcommand("u", (args) -> {
-			return asynPerform(Turtle.up, args.getInt("times"));
-		}, [Int("times")]);
+			return asynPerform(Turtle.up, args.getInt("times") ?? 1);
+		}, [Optional(Int("times"))]);
 
 		registerAsyncSubcommand("d", (args) -> {
-			return asynPerform(Turtle.down, args.getInt("times"));
-		}, [Int("times")]);
+			return asynPerform(Turtle.down, args.getInt("times") ?? 1);
+		}, [Optional(Int("times"))]);
 
 		registerAsyncSubcommand("defrag", (args) -> {
 			return asynPerform(() -> {