diff --git a/params/protocol_params.go b/params/protocol_params.go
index 2ec3a5c249..e8b044f450 100644
--- a/params/protocol_params.go
+++ b/params/protocol_params.go
@@ -180,7 +180,7 @@ const (
 	BlobTxMaxBlobs                     = 6
 	BlobBaseCost                       = 1 << 13 // Base execution gas cost for a blob.
 
-	HistoryServeWindow = 8192 // Number of blocks to serve historical block hashes for, EIP-2935.
+	HistoryServeWindow = 8191 // Number of blocks to serve historical block hashes for, EIP-2935.
 
 	MaxBlockSize = 8_388_608 // maximum size of an RLP-encoded block
 )