diff --git a/goutil.go b/goutil.go
index ef06323..293d567 100644
--- a/goutil.go
+++ b/goutil.go
@@ -174,7 +174,7 @@ func NewCommand(cmd string, f CommandFunc, desc string) Command {
 
 type commandCollection map[string]Command
 
-func UsageAndExit(cmds commandCollection) {
+func usageAndExit(cmds []Command) {
 	fmt.Println(os.Args[0])
 	fmt.Println()
 	fmt.Println("Possible commands:")
@@ -194,16 +194,16 @@ func Execute(possibleCommands []Command) error {
 	}
 	arglen := len(os.Args)
 	if arglen <= 1 {
-		UsageAndExit(commands)
+		usageAndExit(possibleCommands)
 	}
 	cmdStr := os.Args[1]
 	if cmdStr == "help" {
 		if arglen == 2 {
-			UsageAndExit(commands)
+			usageAndExit(possibleCommands)
 		} else {
 			cmd, ok := commands[os.Args[2]]
 			if !ok {
-				UsageAndExit(commands)
+				usageAndExit(possibleCommands)
 			} else {
 				fmt.Println("Description of " + cmd.cmd + ":")
 				fmt.Println("  " + cmd.desc)
@@ -219,7 +219,7 @@ func Execute(possibleCommands []Command) error {
 	}
 	cmd, ok := commands[cmdStr]
 	if !ok {
-		UsageAndExit(commands)
+		usageAndExit(possibleCommands)
 	}
 	if cmd.flags != nil {
 		cmd.flags.Parse(os.Args[2:])