a

1 files changed, 1 insertions, 1 deletions

diff --git a/src/a5.c b/src/a5.c
index bcf6f6b..af90ca0 100644
--- a/src/a5.c
+++ b/src/a5.c
@@ -43,7 +43,7 @@ void a5_loop(uint64_t x0,uint64_t x1){
       uint64_t  index_bit;
 
       index_ptr = index+(t/64);
-      index_bit = 1ULL<<(t%63);
+      index_bit = 1ULL<<(t%64);
 
       if(*index_ptr & index_bit){
         next = x-lastp[t];