1 files changed, 1 insertions, 1 deletions
diff --git a/sha3.c b/sha3.c
index d7aec46e..21e7beb7 100644
--- a/sha3.c
+++ b/sha3.c
@@ -61,7 +61,7 @@ _sha3_update (struct sha3_state *state,
   if (pos > 0)
     {
       unsigned left = block_size - pos;
-      if (length < pos)
+      if (length < left)
 	{
 	  memcpy (block + pos, data, length);
 	  return pos + length;