diff --git a/esp32/platformio.ini b/esp32/platformio.ini
index 3ff62e1..d5b4172 100644
--- a/esp32/platformio.ini
+++ b/esp32/platformio.ini
@@ -30,7 +30,7 @@ build_flags =
     ${features.build_flags}
 	${build_settings.build_flags}
 	-D CORE_DEBUG_LEVEL=3
-	; -D register=
+	-D register=
 	-std=gnu++17
 build_unflags = -std=gnu++11
 test_ignore = test_embedded