diff --git a/script/MultiRegionScan.py b/script/MultiRegionScan.py
index 23aeaefd..b5f00562 100644
--- a/script/MultiRegionScan.py
+++ b/script/MultiRegionScan.py
@@ -86,15 +86,14 @@ class ImageReader(ReadonlyRegisterBase, ReadonlyRegisterMatrix):
         return ny
 
 # plotting current spectrum
-names = []
-names.append("Online Spectrum")
+names = "Online Spectrum"
 plots = plot(None, names)
 global online_spectrum_plot
-online_spectrum_plot = plots[0].getSeries(0)
+spectrum_series = plots[0].getSeries(0)
 task = None
 
 def plot_cur_spectrum():
-    global online_spectrum_plot
+    global spectrum_series
     try:
       while get_context().state.running:
         y = Scienta.spectrum.take(100)