diff --git a/drivers/mfd/wcd9335-regmap.c b/drivers/mfd/wcd9335-regmap.c
index 80495d6e5610..851156f0e34b 100644
--- a/drivers/mfd/wcd9335-regmap.c
+++ b/drivers/mfd/wcd9335-regmap.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -1532,6 +1532,10 @@ static bool wcd9335_is_volatile_register(struct device *dev, unsigned int reg)
 	    reg <= WCD9335_CPE_SS_OUTBOX2_ACK)
 		return true;
 
+	if (reg >= WCD9335_RCO_CAL_OUT_1 &&
+	    reg <= WCD9335_RCO_CAL_OUT_5)
+		return true;
+
 	switch (reg) {
 	case WCD9335_CPE_SS_INBOX1_TRG:
 	case WCD9335_CPE_SS_INBOX2_TRG: