diff --git a/src/nu-git-manager-sugar/git/prompt.nu b/src/nu-git-manager-sugar/git/prompt.nu
index cb33994..2b7bb02 100644
--- a/src/nu-git-manager-sugar/git/prompt.nu
+++ b/src/nu-git-manager-sugar/git/prompt.nu
@@ -62,7 +62,7 @@ const DEFAULT_PROMPT_INDICATORS = {
 export def --env setup [
     --indicators = $DEFAULT_PROMPT_INDICATORS,
     --duration-threshold: duration = 1sec  # the threshold above which the command duration is shown
-] {
+]: nothing -> nothing {
     $env.PROMPT_COMMAND = { get-left-prompt $duration_threshold }
     $env.PROMPT_COMMAND_RIGHT = ""