diff --git a/SAS/ResourceAssignment/Common/lib/specification.py b/SAS/ResourceAssignment/Common/lib/specification.py
index 1341faefab7ebe5629ab62c3269b1ff0c86d98bd..d95aba515c55c8a9a469c2a37d2fee6068c6220a 100644
--- a/SAS/ResourceAssignment/Common/lib/specification.py
+++ b/SAS/ResourceAssignment/Common/lib/specification.py
@@ -825,7 +825,7 @@ class Specification:
                              (start_time, duration, min_starttime, max_endtime))
         # Calculate the effective dwelling time
         max_duration = max_endtime - min_starttime
-        if duration > max_duration
+        if duration > max_duration:
             raise ValueError('task duration %s is larger than max_duration %s from dwelling start/end time' % (duration, max_duration))
 
         dwell_time = max_duration - duration