diff -r 7c71d2f97196 Modules/_sha3/keccak/KeccakF-1600-opt32.c
--- a/Modules/_sha3/keccak/KeccakF-1600-opt32.c	Thu Nov 07 12:37:56 2013 +0100
+++ b/Modules/_sha3/keccak/KeccakF-1600-opt32.c	Thu Nov 07 09:35:30 2013 -0600
@@ -212,7 +212,7 @@
 
 #define extractLanes(laneCount, state, data) \
     { \
-        int i; \
+        unsigned int i; \
         for(i=0; i<(laneCount); i++) \
             setInterleavedWordsInto8bytes(data+i*8, (UINT32*)state+i*2); \
     }