diff --git a/gridded/da/tm5/observationoperator.py b/gridded/da/tm5/observationoperator.py
index 49f4558b8c7367e6fca82713f9b148e979604a5a..cae944d6beaa8a828335d41c865112e569673bf5 100755
--- a/gridded/da/tm5/observationoperator.py
+++ b/gridded/da/tm5/observationoperator.py
@@ -341,7 +341,7 @@ class TM5ObservationOperator(ObservationOperator):
 
         sourcedir = self.dacycle['dir.restart']
         targetdir = self.tm_settings['restart.write.dir']
-        filterlist = '%s' % self.da_cycle['time.sample.start']
+        filterlist = '%s' % self.dacycle['time.sample.start']
 
         for f in os.listdir(sourcedir):
             fpath = os.path.join(sourcedir, f)