diff --git a/navigation.go b/navigation.go
index 73d93b0..ff44a36 100644
--- a/navigation.go
+++ b/navigation.go
@@ -118,7 +118,7 @@ const (
 	NavFlagUturn                   NavFlag = "uturn"
 )
 
-func (n *NavigationService) SetFlag(flag string) error {
+func (n *NavigationService) SetFlag(flag NavFlag) error {
 	log.Debug().Str("func", "SetFlag").Msg("Sending flag")
 	if err := n.dev.checkStatus(n.flagsChar, NavFlagsChar); err != nil {
 		return err