diff --git a/controller/relay-text.go b/controller/relay-text.go
index 4be7656d..d388c473 100644
--- a/controller/relay-text.go
+++ b/controller/relay-text.go
@@ -367,7 +367,7 @@ func relayTextHelper(c *gin.Context, relayMode int) *OpenAIErrorWithStatusCode {
 		}
 		req.Header.Set("Content-Type", c.Request.Header.Get("Content-Type"))
 		req.Header.Set("Accept", c.Request.Header.Get("Accept"))
-		if isStream {
+		if isStream && c.Request.Header.Get("Accept") == "" {
 			req.Header.Set("Accept", "text/event-stream")
 		}
 		//req.Header.Set("Connection", c.Request.Header.Get("Connection"))