diff --git a/mbtrack2/tracking/synchrotron.py b/mbtrack2/tracking/synchrotron.py
index be02931a9635dec14ef653bea537502f5b29c073..c519d5072a88ebc17711fd9f93dbbb02c0e8ad2e 100644
--- a/mbtrack2/tracking/synchrotron.py
+++ b/mbtrack2/tracking/synchrotron.py
@@ -114,6 +114,8 @@ class Synchrotron:
     get_longitudinal_twiss(V)
         Compute the longitudinal Twiss parameters and the synchrotron tune for 
         single or multi-harmonic RF systems.
+    to_pyat(Vrf)
+        Return a pyAT simple_ring element from the Synchrotron element data.
     """
     def __init__(self, h, optics, particle, **kwargs):
         self._h = h