diff --git a/examples/peripherals/lcd/i2c_oled/main/i2c_oled_example_main.c b/examples/peripherals/lcd/i2c_oled/main/i2c_oled_example_main.c
index 098c62d66c..2a11223047 100644
--- a/examples/peripherals/lcd/i2c_oled/main/i2c_oled_example_main.c
+++ b/examples/peripherals/lcd/i2c_oled/main/i2c_oled_example_main.c
@@ -192,7 +192,7 @@ void app_main(void)
     ESP_LOGI(TAG, "Allocate separate LVGL draw buffers");
     // LVGL reserves 2 x 4 bytes in the buffer, as these are assumed to be used as a palette.
     size_t draw_buffer_sz = EXAMPLE_LCD_H_RES * EXAMPLE_LCD_V_RES / 8 + EXAMPLE_LVGL_PALETTE_SIZE;
-    buf = heap_caps_calloc(1, draw_buffer_sz, MALLOC_CAP_INTERNAL);
+    buf = heap_caps_calloc(1, draw_buffer_sz, MALLOC_CAP_INTERNAL | MALLOC_CAP_8BIT);
     assert(buf);
 
     // LVGL9 suooprt new monochromatic format.