diff --git a/po/at-expand.pl b/po/at-expand.pl
index 6bd441fc..931c6a0b 100644
--- a/po/at-expand.pl
+++ b/po/at-expand.pl
@@ -96,6 +96,7 @@ sub do_expand {
     $msg =~ s/\@S/superblock/g;
     $msg =~ s/\@u/unattached/g;
     $msg =~ s/\@v/device/g;
+    $msg =~ s/\@x/extent/g;
     $msg =~ s/\@z/zero-length/g;
     $msg =~ s/\@\@/@/g;
 }