--- a/master/slave.c	Mon Jan 26 13:22:05 2009 +0000
+++ b/master/slave.c	Mon Jan 26 13:28:19 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;