1 files changed, 1 insertions, 1 deletions
diff --git a/src/ref/cipher.c b/src/ref/cipher.c
index 6f1b4b5..8ebbbc3 100644
--- a/src/ref/cipher.c
+++ b/src/ref/cipher.c
@@ -103,7 +103,7 @@ static void _linear_layer(uint8_t X[BLOCK_BYTES])
         X[15] ^= X[j];
     }
 
-    for (size_t j=9; j<15; j++)
+    for (size_t j=14; j>8; j--)
     {
         X[j] ^= X[7];
     }