diff --git a/script/RFscan/GunScan.py b/script/RFscan/GunScan.py
index fb3a82a..08d25ad 100644
--- a/script/RFscan/GunScan.py
+++ b/script/RFscan/GunScan.py
@@ -45,7 +45,7 @@ finally:
 
 print rf_phase
 p = plot(None,name="Energy")[0]
-p.addSeries(LinePlotSeries())
+p.addSeries(LinePlotSeries("data"))
 p.getSeries(0).setData(rf_phase, E)    
 p.getSeries(1).setData(rf_phase, dE)    
 #plot((E, dE), xdata = rf_phase, title="Phase scan")