diff --git a/tools/hotplug/Linux/block b/tools/hotplug/Linux/block
index fb9df6f357..3b1a52915a 100644
--- a/tools/hotplug/Linux/block
+++ b/tools/hotplug/Linux/block
@@ -280,7 +280,7 @@ mount it read-write in a guest domain."
           fi
 
           shared_list=$(losetup -a |
-                sed -n -e "s@^\([^:]\+\)\(:[[:blank:]]\[${dev}\]:${inode}[[:blank:]](.*)\)@\1@p" )
+                sed -n -e "s@^\([^:]\+\)\(:[[:blank:]]\[0*${dev}\]:${inode}[[:blank:]](.*)\)@\1@p" )
           for dev in $shared_list
           do
             if [ -n "$dev" ]