diff -r 703ebf57508a -r c79c5d49ba34 modbus/mb_runtime.h
--- a/modbus/mb_runtime.h	Wed Jul 01 10:36:20 2020 +0200
+++ b/modbus/mb_runtime.h	Thu Aug 13 18:42:02 2020 +0100
@@ -107,7 +107,6 @@
 	    int		prev_error; // error code of the last printed error message (0 when no error) 
 	    pthread_t   thread_id;  // thread handling all communication for this client node
 	    pthread_t	timer_thread_id;  // thread handling periodical timer for this client node
-	    timer_t      timer_id;  // timer used to periodically activate this client node's thread
 	    pthread_mutex_t mutex;  // mutex to be used with the following condition variable
         pthread_cond_t  condv;  // used to signal the client thread when to start new modbus transactions
         int       execute_req;  /* used, in association with condition variable,