diff --git a/command.go b/command.go
index 9d10dfe..9cf25ea 100644
--- a/command.go
+++ b/command.go
@@ -479,7 +479,7 @@ func (inv *Invocation) run(state *runState) error {
 
 	if inv.Command.Handler == nil || errors.Is(state.flagParseErr, pflag.ErrHelp) {
 		if inv.Command.HelpHandler == nil {
-			return defaultHelpFn()(inv)
+			return DefaultHelpFn()(inv)
 		}
 		return inv.Command.HelpHandler(inv)
 	}
diff --git a/help.go b/help.go
index 533be11..207c965 100644
--- a/help.go
+++ b/help.go
@@ -322,9 +322,9 @@ func (lm *newlineLimiter) Write(p []byte) (int, error) {
 
 var usageWantsArgRe = regexp.MustCompile(`<.*>`)
 
-// defaultHelpFn returns a function that generates usage (help)
+// DefaultHelpFn returns a function that generates usage (help)
 // output for a given command.
-func defaultHelpFn() HandlerFunc {
+func DefaultHelpFn() HandlerFunc {
 	return func(inv *Invocation) error {
 		// We use stdout for help and not stderr since there's no straightforward
 		// way to distinguish between a user error and a help request.