diff --git a/src/git.xdrm.io/schastsp/client/keyset/keyset.go b/src/git.xdrm.io/schastsp/client/keyset/keyset.go
index 0a44ac7..4cf6119 100644
--- a/src/git.xdrm.io/schastsp/client/keyset/keyset.go
+++ b/src/git.xdrm.io/schastsp/client/keyset/keyset.go
@@ -19,7 +19,7 @@ type Set struct {
 	max   uint16           // max depth
 
 	sec         []byte     // secret
-	consumption uint       // consumption level
+	consumption uint8      // consumption level
 	// 0: none
 	// 1: need to migrate
 	// 2: waiting migration
@@ -123,6 +123,15 @@ func (s *Set) Decrement() uint16 {
 
 }
 
+
+/* (5) Prepare a renewal
+*
+* @return level<outType>			outDesc
+*
+---------------------------------------------------------*/
+
+
+
 /* (5) Serialisation
 *
 * @return serial<string>			String representation
@@ -155,6 +164,10 @@ func (s *Set) Store(writer io.Writer) error {
 	err = binary.Write(writer, binary.BigEndian, s.depth)
 	if err != nil { return err }
 
+	/* (4) Copy migration level */
+	err = binary.Write(writer, binary.BigEndian, s.consumption)
+	if err != nil { return err }
+
 	return nil
 
 }
@@ -200,6 +213,10 @@ func (s *Set) Fetch(reader io.Reader) error {
 	err = binary.Read(reader, binary.BigEndian, &s.depth)
 	if err != nil { return err }
 
+	/* (6) Try to copy the consumption level */
+	err = binary.Read(reader, binary.BigEndian, &s.consumption)
+	if err != nil { return err }
+
 	return nil
 
 }