diff --git a/addons/web_graph/controllers/graph.py b/addons/web_graph/controllers/graph.py
index 1535bb37452..4444c734204 100644
--- a/addons/web_graph/controllers/graph.py
+++ b/addons/web_graph/controllers/graph.py
@@ -78,6 +78,7 @@ class GraphView(View):
                     'label': fields[x]['string']
                 })
         else:
+            xaxis.reverse()
             axis = obj.read_group(domain, yaxis+xaxis[0:1], xaxis[0:1], context=context)
             for x in axis:
                 key = x[xaxis[0]]