diff --git a/driver.c b/driver.c
index 7351eb32d8..f37890e297 100644
--- a/driver.c
+++ b/driver.c
@@ -204,7 +204,7 @@ void init_drivers_pre(void)
 #endif
 }
 
-void driver_adjust_system_rates(void)
+static void driver_adjust_system_rates(void)
 {
    audio_monitor_adjust_system_rates();
    video_monitor_adjust_system_rates();
diff --git a/driver.h b/driver.h
index 4fb89459c5..3608dad84d 100644
--- a/driver.h
+++ b/driver.h
@@ -358,8 +358,6 @@ void find_next_driver(const char *label, char *str, size_t sizeof_str);
  **/
 void driver_set_nonblock_state(bool enable);
 
-void driver_adjust_system_rates(void);
-
 /**
  * driver_set_refresh_rate:
  * @hz                 : New refresh rate for monitor.