diff --git a/include/drivers/timer/system_timer.h b/include/drivers/timer/system_timer.h
index 7b7da3d7770..7fda00f4219 100644
--- a/include/drivers/timer/system_timer.h
+++ b/include/drivers/timer/system_timer.h
@@ -38,17 +38,6 @@ extern "C" {
  */
 extern int sys_clock_driver_init(const struct device *dev);
 
-/**
- * @brief Initialize system clock driver
- *
- * The system clock is a Zephyr device created globally.  This is its
- * device control callback, used in a few devices for power
- * management.  It is a weak symbol that will be implemented as a noop
- * if undefined in the clock driver.
- */
-extern int clock_device_ctrl(const struct device *dev,
-			     enum pm_device_state state);
-
 /**
  * @brief Set system clock timeout
  *