diff --git a/drivers/regulator/stm32-pwr.c b/drivers/regulator/stm32-pwr.c
index e434b26d4c8b..222d593d76a2 100644
--- a/drivers/regulator/stm32-pwr.c
+++ b/drivers/regulator/stm32-pwr.c
@@ -32,7 +32,7 @@ enum {
 	STM32PWR_REG_NUM_REGS
 };
 
-u32 ready_mask_table[STM32PWR_REG_NUM_REGS] = {
+static u32 ready_mask_table[STM32PWR_REG_NUM_REGS] = {
 	[PWR_REG11] = REG_1_1_RDY,
 	[PWR_REG18] = REG_1_8_RDY,
 	[PWR_USB33] = USB_3_3_RDY,
@@ -44,7 +44,7 @@ struct stm32_pwr_reg {
 	u32 ready_mask;
 };
 
-int stm32_pwr_reg_is_ready(struct regulator_dev *rdev)
+static int stm32_pwr_reg_is_ready(struct regulator_dev *rdev)
 {
 	struct stm32_pwr_reg *priv = rdev_get_drvdata(rdev);
 	u32 val;
@@ -54,7 +54,7 @@ int stm32_pwr_reg_is_ready(struct regulator_dev *rdev)
 	return (val & priv->ready_mask);
 }
 
-int stm32_pwr_reg_is_enabled(struct regulator_dev *rdev)
+static int stm32_pwr_reg_is_enabled(struct regulator_dev *rdev)
 {
 	struct stm32_pwr_reg *priv = rdev_get_drvdata(rdev);
 	u32 val;