diff --git a/script/DelayScan.py b/script/DelayScan.py
index f00748d..28f41db 100644
--- a/script/DelayScan.py
+++ b/script/DelayScan.py
@@ -159,7 +159,7 @@ def Scan(Dtime):
             for i in a1: 
                 a1r.append(i)'''
             a1r = []
-            while time.time() < t_end
+            while time.time() < t_end:
                 a1t = MCPArray1.read().tolist()
                 a1r = [a1r[i]+a1t[i] for i in xrange(len(a1t))]
                 time.sleep(SamplingTime.read()*0.001)