diff --git a/tango/tango/io/digest/Sha01.d b/tango/tango/io/digest/Sha01.d
index 8fdf6300..11969cbb 100644
--- a/tango/tango/io/digest/Sha01.d
+++ b/tango/tango/io/digest/Sha01.d
@@ -162,7 +162,7 @@ package abstract class Sha01 : MerkleDamgard
 
         ***********************************************************************/
 
-        private static const uint[] K =
+        protected static const uint[] K =
         [
                 0x5A827999,
                 0x6ED9EBA1,
@@ -174,7 +174,7 @@ package abstract class Sha01 : MerkleDamgard
 
         ***********************************************************************/
 
-        private static const uint[5] initial =
+        protected static const uint[5] initial =
         [
                 0x67452301,
                 0xEFCDAB89,