diff --git a/boards.txt b/boards.txt
index 482462d0..0a7260ea 100644
--- a/boards.txt
+++ b/boards.txt
@@ -3860,6 +3860,7 @@ m5stack-coreink.upload.tool=esptool_py
 m5stack-coreink.upload.maximum_size=1310720
 m5stack-coreink.upload.maximum_data_size=327680
 m5stack-coreink.upload.wait_for_upload_port=true
+m5stack-coreink.upload.flags=
 
 m5stack-coreink.serial.disableDTR=true
 m5stack-coreink.serial.disableRTS=true