diff --git a/openerp/tools/misc.py b/openerp/tools/misc.py
index d0f8faec6e0..401d10ee035 100644
--- a/openerp/tools/misc.py
+++ b/openerp/tools/misc.py
@@ -1285,6 +1285,8 @@ def get_server_timezone():
     # timezone detection is safe in multithread, so lazy init is ok here
     if config['timezone'] and  \
         not isinstance(config['timezone'], basestring):
+      loglevels.Logger().notifyChannel("detect_server_timezone", loglevels.LOG_WARNING,
+        "Invalid timezone value in configuration or environment: %r, using UTC instead. Please fix this in your configuration" %(config['timezone']))
       return 'UTC'
     if (not config['timezone']):
         config['timezone'] = detect_server_timezone()