diff --git a/src/whirlpool/whirlpool_compress.c b/src/whirlpool/whirlpool_compress.c
index 2af8393..f191857 100644
--- a/src/whirlpool/whirlpool_compress.c
+++ b/src/whirlpool/whirlpool_compress.c
@@ -121,8 +121,7 @@ shift_columns(uint64_t state[8])
 				| (state[(i - 7 + 8) & 7] & 0x00000000000000FFULL);
 	}
 
-	for(uint8_t i = 0; i < 8; ++i)
-		state[i] = tmp[i];
+	memcpy(state, tmp, sizeof(tmp));
 }
 
 static inline void