diff --git a/apps/users/api/user.py b/apps/users/api/user.py
index 122f9e7fa..c2a549b71 100644
--- a/apps/users/api/user.py
+++ b/apps/users/api/user.py
@@ -54,7 +54,7 @@ class UserViewSet(CommonApiMixin, UserQuerysetMixin, SuggestionMixin, BulkModelV
 
     def get_object(self):
         pk = self.kwargs.get(self.lookup_field)
-        if not is_uuid(pk):
+        if pk and not is_uuid(pk):
             return self.get_queryset().get(username=pk)
         return super().get_object()