diff --git a/client/client.go b/client/client.go
index c02d171..6e10d8d 100644
--- a/client/client.go
+++ b/client/client.go
@@ -2,6 +2,8 @@ package client
 
 const apiEndpoint = "https://api.elevenlabs.io"
 
+var ErrUnauthorized error
+
 type Client struct {
 	apiKey string
 }
diff --git a/client/history.go b/client/history.go
index 874d875..fdab811 100644
--- a/client/history.go
+++ b/client/history.go
@@ -11,8 +11,6 @@ import (
 	"github.com/taigrr/elevenlabs/client/types"
 )
 
-var ErrUnauthorized error
-
 func (c Client) HistoryDelete(ctx context.Context, historyItemId string) (bool, error) {
 	// create path and map variables
 	url := fmt.Sprintf(apiEndpoint+"/v1/history/%s", historyItemId)