diff --git a/boards/esp32_solo1.json b/boards/esp32_solo1.json
index c438993f1bfa..ec76a0504241 100644
--- a/boards/esp32_solo1.json
+++ b/boards/esp32_solo1.json
@@ -1,7 +1,7 @@
 {
   "build": {
     "core": "esp32",
-    "extra_flags": "-DARDUINO_TASMOTA -DBOARD_HAS_PSRAM -DESP32_4M -DCORE32SOLO1",
+    "extra_flags": "-DARDUINO_TASMOTA -DESP32_4M -DCORE32SOLO1",
     "f_cpu": "240000000L",
     "f_flash": "40000000L",
     "flash_mode": "dio",