diff --git a/noblogsmv/webapp.py b/noblogsmv/webapp.py
index 3257d1eb57281cdea3b30c845100d1e9c185c266..8c966e5b6736ef5e9f96469c3ea9ea94e368be00 100644
--- a/noblogsmv/webapp.py
+++ b/noblogsmv/webapp.py
@@ -56,7 +56,7 @@ def _mk_stats_graph(x=500, y=270):
 
     chart = SimpleLineChart(x, y)
     _mk_stacked_graph(chart, valuelist)
-    chart.set_legend([None] + labels)
+    chart.set_legend([''] + labels)
     return chart.get_url()