diff --git a/Overlap/plot_traj.py b/Overlap/plot_traj.py
index 571783d480b0f8397f7f52ac45bccd65c1658510..2eb06822ffb37796f3371495c91363a1e1d34e45 100755
--- a/Overlap/plot_traj.py
+++ b/Overlap/plot_traj.py
@@ -102,7 +102,7 @@ if __name__ == "__main__":
     parser.add_argument("shpc_dir", help = "directory containing SHPC, with "
                         "visible eddies at all dates")
     parser.add_argument("-l", "--label",
-                        choices = ["root", "leaf", "split", "merge"])
+                        choices = ["root", "leaf", "split", "merge", "all"])
     parser.add_argument("-s", "--save", metavar = "format",
                         help = "Save file to specified format")
     parser.add_argument("-t", "--time", action = "store_true",