diff --git a/common b/common
index e70d89a58..9a8ba5935 160000
--- a/common
+++ b/common
@@ -1 +1 @@
-Subproject commit e70d89a58dae068be2e19c7c21558707261af96a
+Subproject commit 9a8ba593511f94d59049bd920a6aee9210a2611f
diff --git a/generator/customize.ml b/generator/customize.ml
index c3dd259e8..e64b45c0d 100644
--- a/generator/customize.ml
+++ b/generator/customize.ml
@@ -510,6 +510,18 @@ You can have multiple I<--ssh-inject> options, for different users
 and also for more keys for each user."
   };
 
+  { op_name = "tar-in";
+    op_type = StringPair "TARFILE:REMOTEDIR";
+    op_discrim = "`TarIn";
+    op_shortdesc = "Copy local files or directories from a tarball into image";
+    op_pod_longdesc = "\
+Copy local files or directories from a local tar file
+called C<TARFILE> into the disk image, placing them in the
+directory C<REMOTEDIR> (which must exist).  Note that
+the tar file must be uncompressed (F<.tar.gz> files will not work
+here)";
+  };
+
   { op_name = "timezone";
     op_type = String "TIMEZONE";
     op_discrim = "`Timezone";