diff --git a/scss/util.py b/scss/util.py
index c229438b..4a0ae629 100644
--- a/scss/util.py
+++ b/scss/util.py
@@ -240,7 +240,7 @@ def wrapper(*args):
 def getmtime(filename, storage=None):
     try:
         if storage:
-            d_obj = storage.modified_time(filename)
+            d_obj = storage.get_modified_time(filename)
             return int(time.mktime(d_obj.timetuple()))
         else:
             return int(os.path.getmtime(filename))