--- a/master/slave.h	Mon May 22 09:16:12 2006 +0000
+++ b/master/slave.h	Fri May 26 14:26:57 2006 +0000
@@ -276,6 +276,7 @@
     ec_slave_state_t requested_state; /**< requested slave state */
     ec_slave_state_t current_state; /**< current slave state */
     unsigned int state_error; /**< a state error has happened */
+    unsigned int online; /**< non-zero, if the slave responds. */
 };
 
 /*****************************************************************************/