diff --git a/ess/TraceWin.py b/ess/TraceWin.py
index 103392fafdad89755a0b2ba560ccfad485e35732..d6df4ab2192c4e6e686236d96f7c604d1f64dc29 100644
--- a/ess/TraceWin.py
+++ b/ess/TraceWin.py
@@ -711,7 +711,7 @@ class density_file:
                 if unit:
                     data_set.attrs['unit']=unit
         if partran:
-            # 3 numbers per location..
+            # 1 numbers per location and per run..
             data=['lost', 'powlost']
             units=['', 'W']
             for val,unit in zip(data, units):