diff --git a/src/endpoints/backends/chat-completions.js b/src/endpoints/backends/chat-completions.js
index 9a5672f8f..5f6166e52 100644
--- a/src/endpoints/backends/chat-completions.js
+++ b/src/endpoints/backends/chat-completions.js
@@ -540,6 +540,7 @@ router.post('/status', jsonParser, async function (request, response_getstatus_o
     } else if (request.body.chat_completion_source === CHAT_COMPLETION_SOURCES.MISTRALAI) {
         api_url = 'https://api.mistral.ai/v1';
         api_key_openai = readSecret(SECRET_KEYS.MISTRALAI);
+        headers = { 'Content-Length': '0' }; // WTF?
     } else if (request.body.chat_completion_source === CHAT_COMPLETION_SOURCES.CUSTOM) {
         api_url = request.body.custom_url;
         api_key_openai = readSecret(SECRET_KEYS.CUSTOM);