diff --git a/backend/open_webui/config.py b/backend/open_webui/config.py
index 3a4309438a..fc60455e3e 100644
--- a/backend/open_webui/config.py
+++ b/backend/open_webui/config.py
@@ -605,8 +605,8 @@ def load_oauth_providers():
     OAUTH_PROVIDERS.clear()
     if GOOGLE_CLIENT_ID.value and GOOGLE_CLIENT_SECRET.value:
 
-        def google_oauth_register(client: OAuth):
-            client.register(
+        def google_oauth_register(oauth: OAuth):
+            return oauth.register(
                 name="google",
                 client_id=GOOGLE_CLIENT_ID.value,
                 client_secret=GOOGLE_CLIENT_SECRET.value,
@@ -633,8 +633,8 @@ def load_oauth_providers():
         and MICROSOFT_CLIENT_TENANT_ID.value
     ):
 
-        def microsoft_oauth_register(client: OAuth):
-            client.register(
+        def microsoft_oauth_register(oauth: OAuth):
+            return oauth.register(
                 name="microsoft",
                 client_id=MICROSOFT_CLIENT_ID.value,
                 client_secret=MICROSOFT_CLIENT_SECRET.value,
@@ -658,8 +658,8 @@ def load_oauth_providers():
 
     if GITHUB_CLIENT_ID.value and GITHUB_CLIENT_SECRET.value:
 
-        def github_oauth_register(client: OAuth):
-            client.register(
+        def github_oauth_register(oauth: OAuth):
+            return oauth.register(
                 name="github",
                 client_id=GITHUB_CLIENT_ID.value,
                 client_secret=GITHUB_CLIENT_SECRET.value,
@@ -690,7 +690,7 @@ def load_oauth_providers():
         and OPENID_PROVIDER_URL.value
     ):
 
-        def oidc_oauth_register(client: OAuth):
+        def oidc_oauth_register(oauth: OAuth):
             client_kwargs = {
                 "scope": OAUTH_SCOPES.value,
                 **(
@@ -716,7 +716,7 @@ def load_oauth_providers():
                     % ("S256", OAUTH_CODE_CHALLENGE_METHOD.value)
                 )
 
-            client.register(
+            return oauth.register(
                 name="oidc",
                 client_id=OAUTH_CLIENT_ID.value,
                 client_secret=OAUTH_CLIENT_SECRET.value,
@@ -733,8 +733,8 @@ def load_oauth_providers():
 
     if FEISHU_CLIENT_ID.value and FEISHU_CLIENT_SECRET.value:
 
-        def feishu_oauth_register(client: OAuth):
-            client.register(
+        def feishu_oauth_register(oauth: OAuth):
+            return oauth.register(
                 name="feishu",
                 client_id=FEISHU_CLIENT_ID.value,
                 client_secret=FEISHU_CLIENT_SECRET.value,
diff --git a/backend/open_webui/utils/oauth.py b/backend/open_webui/utils/oauth.py
index 6cf91e3f12..b660267e73 100644
--- a/backend/open_webui/utils/oauth.py
+++ b/backend/open_webui/utils/oauth.py
@@ -615,8 +615,16 @@ class OAuthManager:
         self.app = app
 
         self._clients = {}
+
         for _, provider_config in OAUTH_PROVIDERS.items():
-            provider_config["register"](self.oauth)
+            if "register" not in provider_config:
+                log.error(
+                    f"OAuth provider {provider_config['name']} missing register function"
+                )
+                continue
+
+            client = provider_config["register"](self.oauth)
+            self._clients[provider_config["name"]] = client
 
     def get_client(self, provider_name):
         if provider_name not in self._clients: