diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index 93c98577e8..9c6c876731 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -1070,7 +1070,7 @@ func (bc *Blockchain) isHardforkEnabled(hf *config.Hardfork, blockHeight uint32)
 	hfs := bc.config.Hardforks
 	if hf != nil {
 		start, ok := hfs[hf.String()]
-		if !ok || start < blockHeight {
+		if !ok || start > blockHeight {
 			return false
 		}
 	}