diff --git a/samseg/SamsegLongitudinal.py b/samseg/SamsegLongitudinal.py
index df53d6f..e8ca778 100644
--- a/samseg/SamsegLongitudinal.py
+++ b/samseg/SamsegLongitudinal.py
@@ -178,7 +178,7 @@ def __init__(self,
         self.historyOfTotalTimepointCost = None
         self.historyOfLatentAtlasCost = None
 
-    def segment(self, saveWarp=False, initTransformFile=None)):
+    def segment(self, saveWarp=False, initTransformFile=None):
         # =======================================================================================
         #
         # Main function that runs the whole longitudinal segmentation pipeline