diff --git a/scripts/HFIR_4Circle_Reduction/reduce4circleControl.py b/scripts/HFIR_4Circle_Reduction/reduce4circleControl.py
index 69d7f214c3dd5477bd07e68cbda8fa1660dc3ded..9a21ac224b35625131d7e6b346eb3a9c851f00f7 100644
--- a/scripts/HFIR_4Circle_Reduction/reduce4circleControl.py
+++ b/scripts/HFIR_4Circle_Reduction/reduce4circleControl.py
@@ -946,7 +946,7 @@ class CWSCDReductionControl(object):
 
     def set_ub_matrix(self, exp_number, ub_matrix):
         """
-        TODO/DOC
+        Set up UB matrix to _UBMatrix dictionary 
         :param exp_number:
         :param ub_matrix:
         :return: