diff --git a/platformio.ini b/platformio.ini
index b87baeef..281fac2a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -22,6 +22,7 @@ build_flags =
   -DARDUINO_USB_MODE=1
   -DARDUINO_USB_CDC_ON_BOOT=1
   -DMINIZ_NO_ZLIB_COMPATIBLE_NAMES=1
+  -DMINIZ_NO_STDIO=1
   -DEINK_DISPLAY_SINGLE_BUFFER_MODE=1
   -DDISABLE_FS_H_WARNING=1
 # https://libexpat.github.io/doc/api/latest/#XML_GE