diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c
index 0d15b0e..5139c25 100644
--- a/drivers/w1/w1_io.c
+++ b/drivers/w1/w1_io.c
@@ -356,7 +356,9 @@
 		w1_write_8(sl->master, W1_SKIP_ROM);
 	else {
 		u8 match[9] = {W1_MATCH_ROM, };
-		memcpy(&match[1], (u8 *)&sl->reg_num, 8);
+		u64 rn = le64_to_cpu(*((u64*)&sl->reg_num));
+
+		memcpy(&match[1], &rn, 8);
 		w1_write_block(sl->master, match, 9);
 	}
 	return 0;