diff --git a/package/busybox/busybox.mk b/package/busybox/busybox.mk
index ef628e90e9..0f14bf999d 100644
--- a/package/busybox/busybox.mk
+++ b/package/busybox/busybox.mk
@@ -108,6 +108,8 @@ BUSYBOX_MAKE_OPTS = \
 	CONFIG_PREFIX="$(TARGET_DIR)" \
 	SKIP_STRIP=y
 
+# specifying BUSYBOX_CONFIG_FILE on the command-line overrides the .config
+# setting.
 ifndef BUSYBOX_CONFIG_FILE
 BUSYBOX_CONFIG_FILE = $(call qstrip,$(BR2_PACKAGE_BUSYBOX_CONFIG))
 endif