--- a/master/slave.c	Tue Jan 20 08:04:50 2009 +0000
+++ b/master/slave.c	Tue Jan 20 09:55:32 2009 +0000
@@ -74,6 +74,10 @@
     slave->current_state = EC_SLAVE_STATE_UNKNOWN;
     slave->error_flag = 0;
     slave->force_config = 0;
+    slave->configured_rx_mailbox_offset = 0x0000;
+    slave->configured_rx_mailbox_size = 0x0000;
+    slave->configured_tx_mailbox_offset = 0x0000;
+    slave->configured_tx_mailbox_size = 0x0000;
 
     slave->base_type = 0;
     slave->base_revision = 0;