diff --git a/lvgl_helpers.h b/lvgl_helpers.h
index 05bdd2c..9c622f7 100644
--- a/lvgl_helpers.h
+++ b/lvgl_helpers.h
@@ -40,7 +40,7 @@ extern "C" {
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_ILI9341
 #define DISP_BUF_SIZE  (LV_HOR_RES_MAX * 64)
 #elif defined CONFIG_LV_TFT_DISPLAY_CONTROLLER_SSD1306
-#define DISP_BUF_SIZE  (LV_HOR_RES_MAX*LV_VER_RES_MAX)
+#define DISP_BUF_SIZE  (LV_HOR_RES_MAX * (LV_VER_RES_MAX / 8))
 #elif defined (CONFIG_LV_TFT_DISPLAY_CONTROLLER_FT81X)
 #define DISP_BUF_LINES  40
 #define DISP_BUF_SIZE  (LV_HOR_RES_MAX * DISP_BUF_LINES)