From a419fb9dfa02774ee79b04d8d3be9bc69f15a059 Mon Sep 17 00:00:00 2001
From: Marcin Iwinski <miwinski@juniper.net>
Date: Tue, 11 Feb 2020 13:36:15 +0100
Subject: [PATCH] Add MarkPersistentFlagRequired to README

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index 834f2878..a03ca37e 100644
--- a/README.md
+++ b/README.md
@@ -404,6 +404,12 @@ rootCmd.Flags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
 rootCmd.MarkFlagRequired("region")
 ```
 
+Pesistent flags should be marked as required using a separate function:
+```go
+rootCmd.PersistentFlags().StringVarP(&Region, "region", "r", "", "AWS region (required)")
+rootCmd.MarkPersistentFlagRequired("region")
+```
+
 ## Positional and Custom Arguments
 
 Validation of positional arguments can be specified using the `Args` field