diff --git a/langchain/llms/gpt4all.py b/langchain/llms/gpt4all.py
index 8fc9e84f..e4083847 100644
--- a/langchain/llms/gpt4all.py
+++ b/langchain/llms/gpt4all.py
@@ -153,7 +153,7 @@ class GPT4All(LLM):
         if values["n_threads"] is not None:
             # set n_threads
             values["client"].model.set_thread_count(values["n_threads"])
-        values["backend"] = values["client"].model.model_type
+        values["backend"] = values["client"].model_type
 
         return values