diff --git a/plugins/GunScan.java b/plugins/GunScan.java
index d625175..9d77384 100644
--- a/plugins/GunScan.java
+++ b/plugins/GunScan.java
@@ -32,7 +32,8 @@ public class GunScan extends Panel {
         plot.addSeries(seriesEnergy);
         plot.addSeries(seriesEnergySpread);
         plot.getAxis(Plot.AxisId.X).setLabel("Gun Phase");
-        plot.getAxis(Plot.AxisId.Y).setLabel("MeV");
+        plot.getAxis(Plot.AxisId.Y).setLabel("Energy (MeV)");
+        plot.getAxis(Plot.AxisId.Y2).setLabel("Energy Spread (MeV)");
         plot.setLegendVisible(true);
         setPersistedComponents(SwingUtils.getComponentsByType(panelScanPars, JSpinner.class));
     }