diff --git a/code/espurna/config/build.h b/code/espurna/config/build.h
index 106e7989..ef312406 100644
--- a/code/espurna/config/build.h
+++ b/code/espurna/config/build.h
@@ -1,3 +1,5 @@
 // DO NOT EDIT THIS FILE MANUALLY
 // This file is modified by PlatformIO
+// This file should not be pushed when modified, untrack changes with:
+//  git update-index --assume-unchanged code/espurna/config/build.h
 #define APP_BUILD_FLAGS ""