diff --git a/platformio.ini b/platformio.ini
index e77478b6b..297145fd1 100755
--- a/platformio.ini
+++ b/platformio.ini
@@ -119,7 +119,6 @@ build_flags               = -D NDEBUG
 platform                  = https://github.com/Jason2866/platform-espressif8266.git#core_2_6_1
 build_flags               = ${esp82xx_defaults.build_flags}
                             -Wl,-Teagle.flash.1m.ld
-                            -O2
                             -DBEARSSL_SSL_BASIC
 ; NONOSDK221
 ;                            -DPIO_FRAMEWORK_ARDUINO_ESPRESSIF_SDK221