diff --git a/include/nuttx/drivers/drivers.h b/include/nuttx/drivers/drivers.h
index c1bc04beae..de025d7d00 100644
--- a/include/nuttx/drivers/drivers.h
+++ b/include/nuttx/drivers/drivers.h
@@ -69,6 +69,18 @@ void drivers_initialize(void);
 
 void devnull_register(void);
 
+/****************************************************************************
+ * Name: devascii_register
+ *
+ * Description:
+ *   Register /dev/ascii
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_DEV_ASCII
+void devascii_register(void);
+#endif
+
 /****************************************************************************
  * Name: devrandom_register
  *