diff --git a/README.md b/README.md
index 1c4d6bc..649e2e2 100644
--- a/README.md
+++ b/README.md
@@ -218,6 +218,8 @@ import (
   "github.com/spf13/viper"
 )
 
+var cfgFile string
+
 func init() {
   cobra.OnInitialize(initConfig)
   rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.cobra.yaml)")