diff --git a/api/openai/image.go b/api/openai/image.go
index ba1ba39b..3e4bc349 100644
--- a/api/openai/image.go
+++ b/api/openai/image.go
@@ -127,7 +127,7 @@ func ImageEndpoint(cm *config.ConfigLoader, o *options.Option) func(c *fiber.Ctx
 			config.Backend = model.StableDiffusionBackend
 		case "tinydream":
 			config.Backend = model.TinyDreamBackend
-		default:
+		case "":
 			config.Backend = model.StableDiffusionBackend
 		}