diff --git a/v2/build/version.jam b/v2/build/version.jam
index dc0aa4d9b..a8b5d7e99 100644
--- a/v2/build/version.jam
+++ b/v2/build/version.jam
@@ -5,7 +5,7 @@
 
 rule boost-build ( )
 {
-    return "V2 (Milestone 9)" ;
+    return "V2 (Milestone 9.1)" ;
 }
 rule jam ( )
 {