diff --git a/geomagio/Algorithm.py b/geomagio/Algorithm.py
index 7eccd54e4b5007df975d155d1f87125165c4135c..1f7df82d7d7ce76efd637266eacd9b32fa264b41 100644
--- a/geomagio/Algorithm.py
+++ b/geomagio/Algorithm.py
@@ -53,5 +53,5 @@ class Algorithm(object):
         """
         return self._outchannels
 
-    def get_data_time_extent(self, outstart, outend):
-        return (outstart, outend)
+    def get_input_interval(self, start, end):
+        return (start, end)