diff --git a/mining.go b/mining.go
index 846de39a..d35db716 100644
--- a/mining.go
+++ b/mining.go
@@ -7,6 +7,7 @@ package btcrpcclient
 import (
 	"encoding/hex"
 	"encoding/json"
+	"errors"
 	"github.com/conformal/btcjson"
 	"github.com/conformal/btcutil"
 )