diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go
index a6bf87acbd22..5132da42ae62 100644
--- a/eth/downloader/downloader.go
+++ b/eth/downloader/downloader.go
@@ -815,7 +815,7 @@ func (d *Downloader) findAncestor(p *peerConnection, remoteHeader *types.Header)
 		return 0, err
 	}
 
-	ancestor, err = d.findAncestorBinarySearch(p, mode, remoteHeight, floor)
+	ancestor, err = d.findAncestorBinarySearch(p, mode, localHeight, floor)
 	if err != nil {
 		return 0, err
 	}