diff --git a/main.go b/main.go
index 6f2df5b654f9843437943972012bd25cb07a9e9a..1cf2ead5fd96364d98addc79b87782391dd778dd 100644
--- a/main.go
+++ b/main.go
@@ -66,7 +66,7 @@ func (s *solver) CleanUp(ch *whapi.ChallengeRequest) error {
 	}
 
 	var lastErr error
-	var zones map[int]interface{}
+	zones := map[int]interface{}{}
 	for _, r := range records {
 		if r.Type != "txt_record" {
 			continue