diff --git a/libs/langchain/langchain/chat_models/azure_openai.py b/libs/langchain/langchain/chat_models/azure_openai.py
index cf841d68e3..69e34646e3 100644
--- a/libs/langchain/langchain/chat_models/azure_openai.py
+++ b/libs/langchain/langchain/chat_models/azure_openai.py
@@ -45,7 +45,7 @@ class AzureChatOpenAI(ChatOpenAI):
     """
 
     deployment_name: str = ""
-    openai_api_type: str = "azure"
+    openai_api_type: str = ""
     openai_api_base: str = ""
     openai_api_version: str = ""
     openai_api_key: str = ""
@@ -71,9 +71,7 @@ class AzureChatOpenAI(ChatOpenAI):
             "OPENAI_API_VERSION",
         )
         values["openai_api_type"] = get_from_dict_or_env(
-            values,
-            "openai_api_type",
-            "OPENAI_API_TYPE",
+            values, "openai_api_type", "OPENAI_API_TYPE", default="azure"
         )
         values["openai_organization"] = get_from_dict_or_env(
             values,