diff --git a/tmtcc.py b/tmtcc.py
index 73c00e8..cc34106 100755
--- a/tmtcc.py
+++ b/tmtcc.py
@@ -270,7 +270,7 @@ def main():  # noqa C901: Complexity okay here.
     try:
         while True:
             state = tmtc_backend.periodic_op(None)
-            tc_handler.cfdp_in_ccsds_handler.handler.fsm()
+            tc_handler.cfdp_in_ccsds_handler.fsm()
             if state.request == BackendRequest.TERMINATION_NO_ERROR:
                 sys.exit(0)
             elif state.request == BackendRequest.DELAY_IDLE: