diff --git a/sepolgen/src/sepolgen/yacc.py b/sepolgen/src/sepolgen/yacc.py
index caf98af7..58332de3 100644
--- a/sepolgen/src/sepolgen/yacc.py
+++ b/sepolgen/src/sepolgen/yacc.py
@@ -67,7 +67,7 @@ default_lr  = 'LALR'           # Default LR table generation method
 
 error_count = 3                # Number of symbols that must be shifted to leave recovery mode
 
-import re, types, sys, cStringIO, md5, os.path
+import re, types, sys, cStringIO, hashlib, os.path
 
 # Exception raised for yacc-related errors
 class YaccError(Exception):   pass
@@ -506,7 +506,7 @@ def initialize_vars():
 
     Errorfunc    = None    # User defined error handler
 
-    Signature    = md5.new()   # Digital signature of the grammar rules, precedence
+    Signature    = hashlib.md5()   # Digital signature of the grammar rules, precedence
                                # and other information.  Used to determined when a
                                # parsing table needs to be regenerated.