diff --git a/platformio_override_sample.ini b/platformio_override_sample.ini
index 18febe513..bd4ed2a13 100644
--- a/platformio_override_sample.ini
+++ b/platformio_override_sample.ini
@@ -25,7 +25,7 @@ default_envs =
 
 [common]
 ; *** Use settings from file user_config_override.h 
-build_flags               = 
+build_flags               = ${core_active.build_flags}
                           -DUSE_CONFIG_OVERRIDE
 
 ; *** Upload Serial reset method for Wemos and NodeMCU