diff --git a/cidr.go b/cidr.go
index f09a9eb4..14fb962a 100644
--- a/cidr.go
+++ b/cidr.go
@@ -3,7 +3,6 @@ package mapcidr
 
 import (
 	"encoding/binary"
-	"errors"
 	"fmt"
 	"math"
 	"math/big"