diff --git a/routers/web/repo/actions/badge.go b/routers/web/repo/actions/badge.go
index 30a5bb3b24d..2a95ed66eb2 100644
--- a/routers/web/repo/actions/badge.go
+++ b/routers/web/repo/actions/badge.go
@@ -31,6 +31,8 @@ func GetWorkflowBadge(ctx *context.Context) {
 		}
 		if len(tags) != 0 {
 			tag = tags[0].Name
+		} else {
+			tag = "" // return empty result on no tag
 		}
 		ref = fmt.Sprintf("refs/tags/%s", tag)
 	case tag != "":