diff --git a/eth/catalyst/api.go b/eth/catalyst/api.go
index b5f035b6d2..bdc8ff84e7 100644
--- a/eth/catalyst/api.go
+++ b/eth/catalyst/api.go
@@ -231,7 +231,7 @@ func (api *ConsensusAPI) ForkchoiceUpdatedV3(update engine.ForkchoiceStateV1, pa
 			return engine.STATUS_INVALID, attributesErr("missing withdrawals")
 		case params.BeaconRoot == nil:
 			return engine.STATUS_INVALID, attributesErr("missing beacon root")
-		case !api.checkFork(params.Timestamp, forks.Cancun, forks.Prague):
+		case !api.checkFork(params.Timestamp, forks.Cancun, forks.Prague, forks.Osaka):
 			return engine.STATUS_INVALID, unsupportedForkErr("fcuV3 must only be called for cancun or prague payloads")
 		}
 	}
@@ -550,7 +550,7 @@ func (api *ConsensusAPI) NewPayloadV4(params engine.ExecutableData, versionedHas
 		return invalidStatus, paramsErr("nil beaconRoot post-cancun")
 	case executionRequests == nil:
 		return invalidStatus, paramsErr("nil executionRequests post-prague")
-	case !api.checkFork(params.Timestamp, forks.Prague):
+	case !api.checkFork(params.Timestamp, forks.Prague, forks.Osaka):
 		return invalidStatus, unsupportedForkErr("newPayloadV3 must only be called for cancun payloads")
 	}
 	requests := convertRequests(executionRequests)