diff --git a/drivers/gpio/gpio_stm32.c b/drivers/gpio/gpio_stm32.c
index 736540bc258..22602ce17ae 100644
--- a/drivers/gpio/gpio_stm32.c
+++ b/drivers/gpio/gpio_stm32.c
@@ -241,7 +241,7 @@ int gpio_stm32_configure(const struct device *dev, int pin, int conf, int altf)
 /**
  * @brief GPIO port clock handling
  */
-int gpio_stm32_clock_request(const struct device *dev, bool on)
+static int gpio_stm32_clock_request(const struct device *dev, bool on)
 {
 	const struct gpio_stm32_config *cfg = dev->config;
 	int ret = 0;
diff --git a/drivers/gpio/gpio_stm32.h b/drivers/gpio/gpio_stm32.h
index 7e98d15784a..e33c5566590 100644
--- a/drivers/gpio/gpio_stm32.h
+++ b/drivers/gpio/gpio_stm32.h
@@ -243,12 +243,4 @@ struct gpio_stm32_data {
  */
 int gpio_stm32_configure(const struct device *dev, int pin, int conf, int altf);
 
-/**
- * @brief Enable / disable GPIO port clock.
- *
- * @param dev GPIO port device pointer
- * @param on boolean for on/off clock request
- */
-int gpio_stm32_clock_request(const struct device *dev, bool on);
-
 #endif /* ZEPHYR_DRIVERS_GPIO_GPIO_STM32_H_ */