diff --git a/drivers/mfd/wm8994-regmap.c b/drivers/mfd/wm8994-regmap.c
index 52e9e29449403b1d5b21dc215973f7e4b8de41e6..2fbce9c5950b5fb9657c3589f77e3b5fe5cf5726 100644
--- a/drivers/mfd/wm8994-regmap.c
+++ b/drivers/mfd/wm8994-regmap.c
@@ -1136,7 +1136,7 @@ static bool wm1811_volatile_register(struct device *dev, unsigned int reg)
 
 	switch (reg) {
 	case WM8994_GPIO_6:
-		if (wm8994->revision > 1)
+		if (wm8994->cust_id > 1 || wm8994->revision > 1)
 			return true;
 		else
 			return false;