diff --git a/main.go b/main.go
index 39f2135..fb41f9d 100644
--- a/main.go
+++ b/main.go
@@ -42,6 +42,8 @@ var (
 
 // Preload cached list of files and hashes
 func init() {
+	romCache := ROMCache{}
+	romCache.Cached = make(map[string]bool)
 	go updateROMCache("public")
 }