diff --git a/src/cubehash_impl.h b/src/cubehash_impl.h
index a9aab46..8480372 100644
--- a/src/cubehash_impl.h
+++ b/src/cubehash_impl.h
@@ -113,8 +113,8 @@ public:
 		for (; i < n; ++i)
 			X[i / 4] ^= ( (uint32_t) (data[i])) << ( (i % 4) * 8);
 
-		i++;
-		X[i / 2] ^= ( (uint32_t) 0x80) << ( (i % 4) * 8);
+		//i==n, n<128 (!)
+		X[i / 4] ^= ( (uint32_t) 0x80) << ( (i % 4) * 8);
 
 		rounds (R);