diff --git a/platformio.ini b/platformio.ini
index fc58622..9a9f836 100755
--- a/platformio.ini
+++ b/platformio.ini
@@ -23,6 +23,10 @@ build_flags =
     ; Select the power management chip
     -D AXP192=1
     ; -D AXP2101=1
+    ; hal_init is already used by arduino-esp32 (2.0), rename to LMIC_HAL_init
+    ; to avoid name collision.
+    ; https://github.com/mcci-catena/arduino-lmic/issues/714
+    -D hal_init=LMIC_HAL_init 
 deps_3rd_party =
     ESP8266 and ESP32 OLED driver for SSD1306 displays
     MCCI LoRaWAN LMIC library