diff --git a/rpc/util.go b/rpc/util.go
index 00a418783a0abe14da231c7f6a21626636001a6a..3e8ca3fef09af415c5fef8f55dcb418edd95e69c 100644
--- a/rpc/util.go
+++ b/rpc/util.go
@@ -82,7 +82,7 @@ type RpcServer interface {
 
 type Log struct {
 	Address string   `json:"address"`
-	Topic   []string `json:"topics"`
+	Topic   []string `json:"topic"`
 	Data    string   `json:"data"`
 	Number  uint64   `json:"number"`
 }