diff --git a/eth/handler.go b/eth/handler.go
index 8d56537df9..bd31e0f117 100644
--- a/eth/handler.go
+++ b/eth/handler.go
@@ -432,7 +432,7 @@ func (h *handler) runEthPeer(peer *eth.Peer, handler eth.Handler) error {
 		}()
 	}
 	// If we have any explicit peer required block hashes, request them
-	for number := range h.peerRequiredBlocks {
+	for number, hash := range h.peerRequiredBlocks {
 		resCh := make(chan *eth.Response)
 		if _, err := peer.RequestHeadersByNumber(number, 1, 0, false, resCh); err != nil {
 			return err