diff --git a/tryton/config.py b/tryton/config.py
index cbd13de09c..be3c9edbba 100644
--- a/tryton/config.py
+++ b/tryton/config.py
@@ -181,7 +181,7 @@ else:
         unicode(os.path.dirname(__file__), sys.getfilesystemencoding()),
         '..')))
 
-for dir in [CURRENT_DIR, site.USER_BASE, sys.prefix]:
+for dir in [CURRENT_DIR, getattr(site, 'USER_BASE', sys.prefix), sys.prefix]:
     PIXMAPS_DIR = os.path.join(dir, 'share', 'pixmaps', 'tryton')
     if os.path.isdir(PIXMAPS_DIR):
         break