diff --git a/package/base-files/files/etc/init.d/done b/package/base-files/files/etc/init.d/done
index 374353a23c..32d6118df7 100755
--- a/package/base-files/files/etc/init.d/done
+++ b/package/base-files/files/etc/init.d/done
@@ -4,7 +4,7 @@
 START=95
 boot() {
 	mount_root done
-	rm -f /sysupgrade.tgz
+	rm -f /sysupgrade.tgz && sync
 
 	# process user commands
 	[ -f /etc/rc.local ] && {
diff --git a/package/base-files/files/lib/preinit/80_mount_root b/package/base-files/files/lib/preinit/80_mount_root
index f3fe788e19..265a3f18df 100644
--- a/package/base-files/files/lib/preinit/80_mount_root
+++ b/package/base-files/files/lib/preinit/80_mount_root
@@ -9,6 +9,8 @@ do_mount_root() {
 		echo "- config restore -"
 		cd /
 		tar xzf /sysupgrade.tgz
+		# Prevent configuration corruption on a power loss
+		sync
 	}
 }