#define RX_CALL_REFCOUNT_SEND 5 /* rxi_Send */
#define RX_CALL_REFCOUNT_ACKALL 6 /* rxi_AckAll */
#define RX_CALL_REFCOUNT_ABORT 7 /* delayed abort */
-#define RX_CALL_REFCOUNT_MAX 8 /* array size. */
+#define RX_CALL_REFCOUNT_MTU 8 /* grow mtu event */
+#define RX_CALL_REFCOUNT_MAX 9 /* array size. */
#ifdef RX_REFCOUNT_CHECK
short refCDebug[RX_CALL_REFCOUNT_MAX];
#endif /* RX_REFCOUNT_CHECK */