diff --git a/platformio.ini b/platformio.ini
index 543b837f5..8fe8df5ce 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -968,4 +968,4 @@ src_filter      = ${common.default_src_filter} +<src/HAL/LINUX>
 platform    = atmelavr
 board       = megaatmega2560
 build_flags = -c -H -std=gnu++11 -Wall -Os -D__MARLIN_FIRMWARE__
-src_filter  = +<src/Marlin.cpp>
+src_filter  = +<src/MarlinCore.cpp>