README: describe interworking with flag package
diff --git a/README.md b/README.md
index e7769e9..3b03b0e 100644
--- a/README.md
+++ b/README.md
@@ -235,6 +235,30 @@
viper.BindPFlag("port", serverCmd.Flags().Lookup("port"))
```
+The use of [pflag](https://github.com/spf13/pflag/) in Viper does not preclude
+the use of other packages that use the [flag](https://golang.org/pkg/flag/)
+package from the standard library. The pflag package can handle the flags
+defined for the flag package by importing these flags. This is accomplished
+by a calling a convenience function provided by the pflag package called
+AddGoFlagSet().
+
+Example:
+
+```go
+package main
+
+import (
+ "flag"
+ "github.com/spf13/pflag"
+)
+
+func main() {
+ pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
+ pflag.Parse()
+ ...
+}
+```
+
### Remote Key/Value Store Support
To enable remote support in Viper, do a blank import of the `viper/remote`
