Index: Tools/unicode/makeunicodedata.py
===================================================================
--- Tools/unicode/makeunicodedata.py	(revision 62744)
+++ Tools/unicode/makeunicodedata.py	(working copy)
@@ -60,6 +60,7 @@
 UPPER_MASK = 0x80
 XID_START_MASK = 0x100
 XID_CONTINUE_MASK = 0x200
+HEX_ESCAPE_MASK = 0x400
 
 def maketables(trace=0):
 
@@ -372,6 +373,10 @@
                 flags |= TITLE_MASK
             if category == "Lu":
                 flags |= UPPER_MASK
+            if category[0] == "C":
+                flags |= HEX_ESCAPE_MASK
+            if category[0] == "Z" and char != " ":
+                flags |= HEX_ESCAPE_MASK
             if "XID_Start" in properties:
                 flags |= XID_START_MASK
             if "XID_Continue" in properties: