diff --git a/comIF/obsw_dummy_com_if.py b/comIF/obsw_dummy_com_if.py
index 3a9e56438ba589c73089e460d1ac6d7342b2b084..03be5f9a743d15a80a1d51aeb7bbcd34fd1a71ea 100644
--- a/comIF/obsw_dummy_com_if.py
+++ b/comIF/obsw_dummy_com_if.py
@@ -37,6 +37,7 @@ class DummyComIF(CommunicationInterface):
         pass
 
     def receive_telemetry(self, parameters: any = 0):
+        tm_list = []
         if (self.service_sent == 17 or self.service_sent == 5) and self.reply_pending:
             LOGGER.debug("receive crap called")
             tm_packer = Service1TmPacked(subservice=1, ssc=self.ssc, tc_packet_id=self.tc_packet_id,