diff --git a/ENDA.py b/ENDA.py
index 1b07e81196ecd65c18af87816f11dcc0d5a4485a..04b1f7dac911b9c6fce0bda64a34b4eadd0caf70 100644
--- a/ENDA.py
+++ b/ENDA.py
@@ -460,6 +460,7 @@ class cycle:
         self.ncycles = ncycles
         self.time = time
         self.analysis_times = analysis_times
+        self.assimilation_interval = assimilation_interval
         self.initial_state = initial_state
         self.backgrounds = backgrounds
         self.analyses = analyses