Add UUID for 2.7.
diff --git a/Tools/msi/msi.py b/Tools/msi/msi.py
index bb74d53..285cb9f 100644
--- a/Tools/msi/msi.py
+++ b/Tools/msi/msi.py
@@ -111,6 +111,7 @@
     "24":"{9B81E618-2301-4035-AC77-75D9ABEB7301}",
     "25":"{2e41b118-38bd-4c1b-a840-6977efd1b911}",
     "26":"{34ebecac-f046-4e1c-b0e3-9bac3cdaacfa}",
+    "27":"{4fe21c76-1760-437b-a2f2-99909130a175}",
     } [major+minor]
 
 # Compute the name that Sphinx gives to the docfile