diff --git a/otherworld b/otherworld
index f0eac32..4c0b6c7 100755
--- a/otherworld
+++ b/otherworld
@@ -176,7 +176,7 @@ command_env = {}
 command_workdir = None
 
 quiet = False
-tty = True
+tty = sys.stdout.isatty()
 
 # load config from files
 config = load_config_files({