diff --git a/package/base-files/files/lib/functions/uci-defaults.sh b/package/base-files/files/lib/functions/uci-defaults.sh
index c2c6dc3fdc..0d2dcd5241 100755
--- a/package/base-files/files/lib/functions/uci-defaults.sh
+++ b/package/base-files/files/lib/functions/uci-defaults.sh
@@ -615,6 +615,5 @@ board_config_update() {
 }
 
 board_config_flush() {
-	json_dump -i > /tmp/.board.json
-	mv /tmp/.board.json ${CFG}
+	json_dump -i -o ${CFG}
 }