diff --git a/tools/platformio-build.py b/tools/platformio-build.py
index 283a91583..45a138fd2 100644
--- a/tools/platformio-build.py
+++ b/tools/platformio-build.py
@@ -52,7 +52,7 @@ assert isdir(FRAMEWORK_DIR)
 
 env.Prepend(
     CPPDEFINES=[
-        ("ARDUINO", 10600),
+        ("ARDUINO", 10805),
         "LWIP_OPEN_SRC"
     ],
     CPPPATH=[