--- pycrypto-2.6.1/src/hash_SHA2_template.c.orig	2013-10-14 14:38:10.000000000 -0700
+++ pycrypto-2.6.1/src/hash_SHA2_template.c	2014-05-19 10:15:51.000000000 -0700
@@ -87,7 +87,7 @@
  * return 1 on success
  * return 0 if the length overflows
  */
-int add_length(hash_state *hs, sha2_word_t inc) {
+static int add_length(hash_state *hs, sha2_word_t inc) {
     sha2_word_t overflow_detector;
     overflow_detector = hs->length_lower;
     hs->length_lower += inc;
