diff --git a/platformio.ini b/platformio.ini
index e8574470..c252432b 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -18,7 +18,9 @@ board_upload.flash_size = 16MB
 board_upload.maximum_size = 16777216
 board_upload.offset_address = 0x10000
 
+build_unflags = -fno-lto
 build_flags =
+  -flto
   -DARDUINO_USB_MODE=1
   -DARDUINO_USB_CDC_ON_BOOT=1
   -DMINIZ_NO_ZLIB_COMPATIBLE_NAMES=1