diff --git a/src/bin/Turtle.hx b/src/bin/Turtle.hx
index 727826f..ec3109b 100644
--- a/src/bin/Turtle.hx
+++ b/src/bin/Turtle.hx
@@ -31,9 +31,9 @@ class Turtle extends CLIAppBase {
 		});
 	}
 
-	private function checkAvailable(): Bool {
-		if (!kernel.turtle.Turtle.isTurtle()){
-			handle.write("No turtle attached");
+	private function checkAvailable():Bool {
+		if (!kernel.turtle.Turtle.isTurtle()) {
+			handle.write("This is not a turtle!");
 			return false;
 		}
 		return true;