Index: test-suite/trunk/utils/compare.py
===================================================================
--- test-suite/trunk/utils/compare.py
+++ test-suite/trunk/utils/compare.py
@@ -141,8 +141,8 @@
 
     gm_row = {c: '' for c in dataout.columns}
     gm_row['diff'] = gm_diff
-    gm_row['Program'] = 'Geomean difference'
-    return dataout.append(gm_row, ignore_index=True)
+    series = pd.Series(gm_row, name='Geomean difference')
+    return dataout.append(series)
 
 def filter_failed(data, key='Exec'):
     return data.loc[data[key] == "pass"]
@@ -220,12 +220,12 @@
         # Take 15 topmost elements
         dataout = dataout.head(15)
 
+    if show_diff_column:
+      dataout = add_geomean_row(d, dataout)
+
     # Turn index into a column so we can format it...
     dataout.insert(0, 'Program', dataout.index)
 
-    if show_diff_column:
-        dataout = add_geomean_row(d, dataout)
-
     formatters = dict()
     formatters['diff'] = format_diff
     if shorten_names: