1 files changed, 2 insertions, 1 deletions
diff --git a/lib.py b/lib.py
index 6d1fec8..87bfb81 100644
--- a/lib.py
+++ b/lib.py
@@ -480,7 +480,8 @@ def xdot_graph(*args, **kwargs):
 
 @export
 def main(graph, argv, *args, **kws):
-    x, argv = (1, argv[1:]) if len(argv) > 1 and argv[1] == '-x' else (0, argv)
+    # -x deprecated, supported for backward compatibility
+    x, argv = (1, argv[1:]) if len(argv) <= 1 or argv[1] == '-x' else (0, argv)
     output = kws.pop('output', 'sinenomine')
     if x:
         xdot_graph(graph, **kws)