diff --git a/modoboa/extensions/webmail/lib.py b/modoboa/extensions/webmail/lib.py
index 3d603fa28..d8693c0b2 100644
--- a/modoboa/extensions/webmail/lib.py
+++ b/modoboa/extensions/webmail/lib.py
@@ -293,7 +293,7 @@ class ImapEmail(Email):
                 continue
             fname = "webmail/%s_%s" % (self.mailid, cid)
             path = os.path.join(settings.MEDIA_ROOT, fname)
-            params["fname"] = settings.MEDIA_URL/+"%s" % fname
+            params["fname"] = settings.MEDIA_URL+"/%s" % fname
             if os.path.exists(path):
                 continue