diff --git a/middleware/distributor.go b/middleware/distributor.go
index 3f7103990..9faee8013 100644
--- a/middleware/distributor.go
+++ b/middleware/distributor.go
@@ -246,7 +246,7 @@ func getModelRequest(c *gin.Context) (*ModelRequest, bool, error) {
 		modelRequest.Model = common.GetStringIfEmpty(modelRequest.Model, "dall-e")
 	} else if strings.HasPrefix(c.Request.URL.Path, "/v1/images/edits") {
 		//modelRequest.Model = common.GetStringIfEmpty(c.PostForm("model"), "gpt-image-1")
-		contentType := c.Request.Header.Get("Content-Type")
+		contentType := c.ContentType()
 		if slices.Contains([]string{gin.MIMEPOSTForm, gin.MIMEMultipartPOSTForm}, contentType) {
 			modelRequest.Model = c.PostForm("model")
 		}