diff --git a/openerp/addons/base/ir/ir_qweb.py b/openerp/addons/base/ir/ir_qweb.py
index e73305bf563..b2fcd20d663 100644
--- a/openerp/addons/base/ir/ir_qweb.py
+++ b/openerp/addons/base/ir/ir_qweb.py
@@ -1077,7 +1077,7 @@ class AssetsBundle(object):
             sep = '\n            '
         response = []
         if debug:
-            if css and self.stylesheet:
+            if css and self.stylesheets:
                 self.compile_sass()
                 for style in self.stylesheets:
                     response.append(style.to_html())