diff --git a/internal/theme/common/custombackground.go b/internal/theme/common/custombackground.go
index 9b9a1d2..f786f2e 100644
--- a/internal/theme/common/custombackground.go
+++ b/internal/theme/common/custombackground.go
@@ -31,11 +31,11 @@ var repeat = map[string]string{
 	"no-repeat": "no-repeat",
 }
 
-var backgroud = safety.NewVar("")
+var backgroud = safety.NewVar("default")
 
 func (h *Handle) CustomBackGround() {
 	b := backgroud.Load()
-	if b == "" {
+	if b == "default" {
 		b = h.CalCustomBackGround()
 		backgroud.Store(b)
 	}