diff --git a/platformio.ini b/platformio.ini
index cfba6b82..7c2de89a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -25,6 +25,7 @@ build_flags =
   -DEINK_DISPLAY_SINGLE_BUFFER_MODE=1
   -DDISABLE_FS_H_WARNING=1
   -DDESTRUCTOR_CLOSES_FILE=1
+  -DENABLE_IMAGE_DITHERING_EXTENSION
 # https://libexpat.github.io/doc/api/latest/#XML_GE
   -DXML_GE=0
   -DXML_CONTEXT_BYTES=1024