diff --git a/drivers/power/supply/twl4030_charger.c b/drivers/power/supply/twl4030_charger.c
index abd10f6861ae06277820855045fd26780619449a..2f82d0e9ec1bf7eaf879a57faa3b1da14303d99c 100644
--- a/drivers/power/supply/twl4030_charger.c
+++ b/drivers/power/supply/twl4030_charger.c
@@ -943,7 +943,7 @@ static int twl4030_bci_set_property(struct power_supply *psy,
 	return 0;
 }
 
-int twl4030_bci_property_is_writeable(struct power_supply *psy,
+static int twl4030_bci_property_is_writeable(struct power_supply *psy,
 				      enum power_supply_property psp)
 {
 	switch (psp) {