diff --git a/addons/report_webkit/webkit_report.py b/addons/report_webkit/webkit_report.py
index a16d6d85e78..07eb485260e 100644
--- a/addons/report_webkit/webkit_report.py
+++ b/addons/report_webkit/webkit_report.py
@@ -146,7 +146,7 @@ class WebKitParser(report_sxw):
         command.append(out)
         generate_command = ' '.join(command)
         try:
-            status = subprocess.call(command)
+            status = subprocess.call(command, stderr=subprocess.PIPE) # ignore stderr
             if status :
                 raise except_osv(
                                 _('Webkit raise an error' ),