diff --git a/api/services/userService.go b/api/services/userService.go
index 816cbff..5c21787 100644
--- a/api/services/userService.go
+++ b/api/services/userService.go
@@ -63,15 +63,15 @@ func (us UserService) AddScopes(username string, scopes []string) error {
 		return errors.New(repositories.ErrUserNotFound)
 	}
 
-	newScopes := strings.Split(usr.Scopes, ",")
+	currentScopes := strings.Split(usr.Scopes, ",")
 
 	// check the current scopes
-	for _, item := range strings.Split(usr.Scopes, ",") {
-		if !us.doesScopeExist(scopes, item) {
-			newScopes = append(newScopes, item)
+	for _, item := range scopes {
+		if !strings.Contains(usr.Scopes, item) {
+			currentScopes = append(currentScopes, item)
 		}
 	}
-	return us.repo.UpdateScopes(username, strings.Join(newScopes, ","))
+	return us.repo.UpdateScopes(username, strings.Join(currentScopes, ","))
 }
 
 func (us UserService) RemoveScopes(username string, scopes []string) error {