diff --git a/variants/m5stack_coreink/platformio.ini b/variants/m5stack_coreink/platformio.ini
index a8f01edea..a6a35d80e 100644
--- a/variants/m5stack_coreink/platformio.ini
+++ b/variants/m5stack_coreink/platformio.ini
@@ -2,10 +2,13 @@
 extends = esp32_base
 board = m5stack-coreink
 build_flags = 
-  ${esp32_base.build_flags} -D PRIVATE_HW -I variants/m5stack_coreink
+  ${esp32_base.build_flags} -D M5_COREINK -I variants/m5stack_coreink
   ;-D RADIOLIB_VERBOSE
   -Ofast
   -D__MCUXPRESSO
+  -DEPD_HEIGHT=200
+  -DEPD_WIDTH=200
+  -DM5STACK
 lib_deps = 
   ${esp32_base.lib_deps}
   zinggjm/GxEPD2@^1.4.5