diff --git a/core/headerchain.go b/core/headerchain.go
index f21dcf537e..e9c04c6546 100644
--- a/core/headerchain.go
+++ b/core/headerchain.go
@@ -165,7 +165,9 @@ func (hc *HeaderChain) WriteHeader(header *types.Header) (status WriteStatus, er
 	// If the total difficulty is higher than our known, add it to the canonical chain
 	// Second clause in the if statement reduces the vulnerability to selfish mining.
 	// Please refer to http://www.cs.cornell.edu/~ie53/publications/btcProcFC.pdf
-	if externTd.Cmp(localTd) > 0 || (externTd.Cmp(localTd) == 0 && mrand.Float64() < 0.5) {
+	if externTd.Cmp(localTd) > 0 ||
+		(externTd.Cmp(localTd) == 0 && header.Number.Uint64() < hc.CurrentHeader().Number.Uint64()) ||
+		(externTd.Cmp(localTd) == 0 && mrand.Float64() < 0.5) {
 		// If the header can be added into canonical chain, adjust the
 		// header chain markers(canonical indexes and head header flag).
 		//