diff --git a/.gitignore b/.gitignore
index a54b77b1c53..e984307a3a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,3 +40,6 @@ tags
 .xxproject
 .envrc
 .vscode
+
+# Disables the warning about the changed behavior for Kconfig defaults
+hide-defaults-note
diff --git a/cmake/app/boilerplate.cmake b/cmake/app/boilerplate.cmake
index 9e166d65f31..7dd271e36a2 100644
--- a/cmake/app/boilerplate.cmake
+++ b/cmake/app/boilerplate.cmake
@@ -322,3 +322,20 @@ foreach(boilerplate_lib ${ZEPHYR_INTERFACE_LIBS_PROPERTY})
     ${boilerplate_lib}
     )
 endforeach()
+
+
+if(NOT EXISTS ${ZEPHYR_BASE}/hide-defaults-note)
+    message(STATUS "\n\
+*******************************\n\
+*** NOTE TO KCONFIG AUTHORS ***\n\
+*******************************\n\
+\n\
+The behavior of Kconfig 'default' properties in Zephyr has changed. The \n\
+earliest default with a satisfied condition is now used, instead of the \n\
+last one. This is standard Kconfig behavior.\n\
+\n\
+See http://docs.zephyrproject.org/porting/board_porting.html#old-zephyr-kconfig-behavior-for-defaults.\n\
+\n\
+To get rid of this note, create a file called 'hide-defaults-note' in the \n\
+Zephyr root directory. An empty file is fine.")
+endif()