diff --git a/osfmk/ipc/ipc_right.c b/osfmk/ipc/ipc_right.c
index a81ac21..32a9a3e 100644
--- a/osfmk/ipc/ipc_right.c
+++ b/osfmk/ipc/ipc_right.c
@@ -912,7 +912,6 @@ ipc_right_destroy(
        mach_port_type_t type;
 
        bits = entry->ie_bits;
-       entry->ie_bits &= ~IE_BITS_TYPE_MASK;
        type = IE_BITS_TYPE(bits);
 
        assert(is_active(space));

kern_return_t
ipc_right_destroy(
	ipc_space_t             space,
	mach_port_name_t        name,
	ipc_entry_t             entry,
	boolean_t               check_guard,
	uint64_t                guard)
{
...
		if (type == MACH_PORT_TYPE_SEND) {
			if (ip_is_pinned(port)) {
				assert(ip_active(port));
				is_write_unlock(space);
				mach_port_guard_exception_pinned(space,  // <---- [0]
                                        name, port, MPG_FLAGS_MOD_REFS_PINNED_DESTROY);
				return KERN_INVALID_CAPABILITY;
			}
			ipc_hash_delete(space, ip_to_object(port), name, entry);
		}
...
		if ((type & MACH_PORT_TYPE_RECEIVE) &&
		    (check_guard) && (port->ip_guarded) &&
		    (guard != port->ip_context)) {
			/* Guard Violation */
			uint64_t portguard = port->ip_context;
			ip_mq_unlock(port);
			is_write_unlock(space);
			/* Raise mach port guard exception */
			mach_port_guard_exception(name,  // <---- [1]
                                0, portguard, kGUARD_EXC_DESTROY);
			return KERN_INVALID_RIGHT;
		}

void
mach_port_guard_ast(thread_t t,
    mach_exception_data_type_t code, mach_exception_data_type_t subcode)
{
        ...
        	if (reason <= MAX_FATAL_kGUARD_EXC_CODE) {
		/*
		 * Fatal Mach port guards - always delivered synchronously.
		 * Check if anyone has registered for Synchronous EXC_GUARD, if yes then,
		 * deliver it synchronously and then kill the process, else kill the process
		 * and deliver the exception via EXC_CORPSE_NOTIFY.
		 */
		if (task_exception_notify(EXC_GUARD, code, subcode) == KERN_SUCCESS) {
			task_bsdtask_kill(task);
		} else {
			exit_with_guard_exception(get_bsdtask_info(task), code, subcode);
		}
        ...