diff --git a/pkg/syserr/host_linux.go b/pkg/syserr/host_linux.go
index 77c213c7e..20b023a4e 100644
--- a/pkg/syserr/host_linux.go
+++ b/pkg/syserr/host_linux.go
@@ -81,7 +81,8 @@ var (
 	ErrShouldRestart             = newWithHost("interrupted system call should be restarted", errno.ERESTART, unix.ERESTART)
 	ErrStreamPipe                = newWithHost("streams pipe error", errno.ESTRPIPE, unix.ESTRPIPE)
 	ErrStructureNeedsCleaning    = newWithHost("structure needs cleaning", errno.EUCLEAN, unix.EUCLEAN)
-	ErrIsNamedFile               = newWithHost("is a named type file", errno.ENOTNAM, unix.ENOTNAM)
+	ErrIsNotNamedFile            = newWithHost("not a XENIX named type file", errno.ENOTNAM, unix.ENOTNAM)
+	ErrIsNamedFile               = newWithHost("is a named type file", errno.EISNAM, unix.EISNAM)
 	ErrRemoteIO                  = newWithHost("remote I/O error", errno.EREMOTEIO, unix.EREMOTEIO)
 	ErrNoMedium                  = newWithHost("no medium found", errno.ENOMEDIUM, unix.ENOMEDIUM)
 	ErrWrongMediumType           = newWithHost("wrong medium type", errno.EMEDIUMTYPE, unix.EMEDIUMTYPE)