diff --git a/op-node/rollup/derive/engine_controller.go b/op-node/rollup/derive/engine_controller.go
index c073af49380ed..f6282822eb8ca 100644
--- a/op-node/rollup/derive/engine_controller.go
+++ b/op-node/rollup/derive/engine_controller.go
@@ -123,7 +123,7 @@ func (e *EngineController) SetUnsafeHead(r eth.L2BlockRef) {
 
 // SetBackupUnsafeL2Head implements LocalEngineControl.
 func (e *EngineController) SetBackupUnsafeL2Head(r eth.L2BlockRef, triggerReorg bool) {
-	e.metrics.RecordL2Ref("l2_backupUnsafe", r)
+	e.metrics.RecordL2Ref("l2_backup_unsafe", r)
 	e.backupUnsafeHead = r
 	e.needFCUCallForBackupUnsafeReorg = triggerReorg
 }
diff --git a/op-node/rollup/derive/engine_queue.go b/op-node/rollup/derive/engine_queue.go
index 7aa1b2823a811..49c7c514281cc 100644
--- a/op-node/rollup/derive/engine_queue.go
+++ b/op-node/rollup/derive/engine_queue.go
@@ -426,7 +426,7 @@ func (eq *EngineQueue) logSyncProgress(reason string) {
 		"l2_safe", eq.ec.SafeL2Head(),
 		"l2_safe_pending", eq.ec.PendingSafeL2Head(),
 		"l2_unsafe", eq.ec.UnsafeL2Head(),
-		"l2_backupUnsafe", eq.ec.BackupUnsafeL2Head(),
+		"l2_backup_unsafe", eq.ec.BackupUnsafeL2Head(),
 		"l2_time", eq.ec.UnsafeL2Head().Time,
 		"l1_derived", eq.origin,
 	)