2 files changed, 2 insertions, 2 deletions
diff --git a/c/sha3.c b/c/sha3.c
index de05328..47867b8 100644
--- a/c/sha3.c
+++ b/c/sha3.c
@@ -382,7 +382,7 @@ extern void initialise(long bitrate, long capacity, long output)
   w = b / 25;
   l = lb(w);
   nr = 12 + (l << 1);
-  wmod = (1L << w) - 1L;
+  wmod = w == 64 ? -1LL ? (1LL << w) - 1LL;
   S = (llong*)malloc(25 * sizeof(llong));
   M = (byte*)malloc(mlen = (r * b) >> 2);
   mptr = 0;
diff --git a/pure-java/SHA3.java b/pure-java/SHA3.java
index 700e469..2e0f774 100644
--- a/pure-java/SHA3.java
+++ b/pure-java/SHA3.java
@@ -362,7 +362,7 @@ public class SHA3
         SHA3.w = SHA3.b / 25;
         SHA3.l = SHA3.lb(SHA3.w);
         SHA3.nr = 12 + (SHA3.l << 1);
-        SHA3.wmod = (1L << SHA3.w) - 1L;
+        SHA3.wmod = w == 64 ? -1L : (1L << SHA3.w) - 1L;
         SHA3.S = new long[25];
         SHA3.M = new byte[(SHA3.r * SHA3.b) >> 2];
 	SHA3.mptr = 0;