diff --git a/temporal/api/enums/v1/failed_cause.proto b/temporal/api/enums/v1/failed_cause.proto
index b7162f700..f902aa9a1 100644
--- a/temporal/api/enums/v1/failed_cause.proto
+++ b/temporal/api/enums/v1/failed_cause.proto
@@ -153,6 +153,8 @@ enum ResourceExhaustedCause {
     RESOURCE_EXHAUSTED_CAUSE_OPS_LIMIT = 9;
     // Limits related to Worker Deployments are reached.
     RESOURCE_EXHAUSTED_CAUSE_WORKER_DEPLOYMENT_LIMITS = 10;
+    // Namespace exceeds bandwidth limit.
+    RESOURCE_EXHAUSTED_CAUSE_BANDWIDTH_LIMIT = 11;
 }
 
 enum ResourceExhaustedScope {