diff --git a/params/forks/forks.go b/params/forks/forks.go
index aab0a54ab7..adb65c8624 100644
--- a/params/forks/forks.go
+++ b/params/forks/forks.go
@@ -77,4 +77,9 @@ var forkToString = map[Fork]string{
 	Cancun:           "Cancun",
 	Prague:           "Prague",
 	Osaka:            "Osaka",
+	BPO1:             "BPO1",
+	BPO2:             "BPO2",
+	BPO3:             "BPO3",
+	BPO4:             "BPO4",
+	BPO5:             "BPO5",
 }