--- util/getroot.c.orig	2013-04-14 13:45:24.542255329 -0700
+++ util/getroot.c	2013-04-14 13:46:36.955252100 -0700
@@ -1925,6 +1925,7 @@
 	      goto devmapper_out;
 	    }
 	  mapper_name = child_name;
+      *is_part = 1;
 
 devmapper_out:
 	  if (! mapper_name && node)