diff --git a/boards/esp32s3-usb-otg/board.c b/boards/esp32s3-usb-otg/board.c
new file mode 100644
index 0000000000000..c4331a7a5dcdd
--- /dev/null
+++ b/boards/esp32s3-usb-otg/board.c
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2023 Gunar Schorcht
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_esp32s3_usb_otg
+ * @{
+ *
+ * @file
+ * @brief       Board specific initializations for ESP32-S3-USB-OTG boards
+ *
+ * @author      Gunar Schorcht <gunar@schorcht.net>
+ */
+
+#include "board.h"
+
+void board_init(void)
+{
+#if MODULE_ST7735
+    gpio_init(LCD_BACKLIGHT, GPIO_OUT);
+#endif
+}
diff --git a/boards/esp32s3-usb-otg/include/board.h b/boards/esp32s3-usb-otg/include/board.h
index 769a7acf4ff38..de81aa75fcb65 100644
--- a/boards/esp32s3-usb-otg/include/board.h
+++ b/boards/esp32s3-usb-otg/include/board.h
@@ -163,8 +163,8 @@
 #define ST7735_PARAM_INVERTED       1
 #define ST7735_PARAM_RGB            1
 
-#define BACKLIGHT_ON                gpio_clear(LCD_BACKLIGHT)
-#define BACKLIGHT_OFF               gpio_set(LCD_BACKLIGHT)
+#define BACKLIGHT_ON                gpio_set(LCD_BACKLIGHT)
+#define BACKLIGHT_OFF               gpio_clear(LCD_BACKLIGHT)
 #endif
 /** @} */