diff --git a/ports/esp32/boards/ESP32_GENERIC_S3/board.json b/ports/esp32/boards/ESP32_GENERIC_S3/board.json
index 7a546d35fc..b383dfa068 100644
--- a/ports/esp32/boards/ESP32_GENERIC_S3/board.json
+++ b/ports/esp32/boards/ESP32_GENERIC_S3/board.json
@@ -22,5 +22,8 @@
     "vendor": "Espressif",
     "variants": {
         "SPIRAM_OCT": "Support for Octal-SPIRAM"
+    },
+    "old_variants": {
+        "FLASH_4M": ["4MiB flash", "Use the standard variant instead."]
     }
 }