diff --git a/modoboa/extensions/stats/app_settings.py b/modoboa/extensions/stats/app_settings.py
index 8020e7299..86e0a749a 100644
--- a/modoboa/extensions/stats/app_settings.py
+++ b/modoboa/extensions/stats/app_settings.py
@@ -21,9 +21,3 @@ class ParametersForm(AdminParametersForm):
         initial="/tmp/modoboa",
         help_text=ugettext_lazy("Path to directory where RRD files are stored")
     )
-
-    img_rootdir = forms.CharField(
-        label=ugettext_lazy("Directory to store PNG files"),
-        initial="/tmp/modoboa",
-        help_text=ugettext_lazy("Path to directory where PNG files are stored")
-    )
diff --git a/modoboa/extensions/stats/grapher.py b/modoboa/extensions/stats/grapher.py
index 289ae93d2..d410f74b1 100644
--- a/modoboa/extensions/stats/grapher.py
+++ b/modoboa/extensions/stats/grapher.py
@@ -3,6 +3,7 @@ import sys
 import os
 import time
 from django.utils.translation import ugettext as _, ugettext_lazy
+from django.conf import settings
 from modoboa.lib import parameters
 
 periods = [{"name": "day", "label": ugettext_lazy("Day")},
@@ -35,7 +36,7 @@ def str2Time(y, M, d, h="00", m="00", s="00"):
 class Grapher(object):
     def __init__(self):
         self.rrd_rootdir = parameters.get_admin("RRD_ROOTDIR")
-        self.img_rootdir = parameters.get_admin("IMG_ROOTDIR")
+        self.img_rootdir = os.path.join(settings.MEDIA_ROOT, "stats")
 
     def process(self, target, suffix, start, end, graph_tpl):
         import rrdtool
diff --git a/modoboa/lib/fixtures/demo.json b/modoboa/lib/fixtures/demo.json
index cdd99ecb9..737dff0b0 100644
--- a/modoboa/lib/fixtures/demo.json
+++ b/modoboa/lib/fixtures/demo.json
@@ -39,14 +39,6 @@
             "value": "vmail"
         }
     },
-    {
-        "pk": 12,
-        "model": "lib.parameter",
-        "fields": {
-            "name": "stats.IMG_ROOTDIR",
-            "value": "/srv/www/modoboa/media/stats"
-        }
-    },
     {
         "pk": 13,
         "model": "lib.parameter",