diff --git a/temporal/api/enums/v1/failed_cause.proto b/temporal/api/enums/v1/failed_cause.proto
index a13684c7..35877805 100644
--- a/temporal/api/enums/v1/failed_cause.proto
+++ b/temporal/api/enums/v1/failed_cause.proto
@@ -127,3 +127,12 @@ enum ResourceExhaustedCause {
     // Caller exceeds action per second limit.
     RESOURCE_EXHAUSTED_CAUSE_APS_LIMIT = 6;
 }
+
+enum ResourceExhaustedScope {
+    RESOURCE_EXHAUSTED_SCOPE_UNSPECIFIED = 0;
+    // Exhausted resource is a system-level resource.
+    RESOURCE_EXHAUSTED_SCOPE_NAMESPACE = 1;
+    // Exhausted resource is a namespace-level resource.
+    RESOURCE_EXHAUSTED_SCOPE_SYSTEM = 2;
+}
+
diff --git a/temporal/api/errordetails/v1/message.proto b/temporal/api/errordetails/v1/message.proto
index 5c9dec6e..ab86baa6 100644
--- a/temporal/api/errordetails/v1/message.proto
+++ b/temporal/api/errordetails/v1/message.proto
@@ -94,6 +94,7 @@ message PermissionDeniedFailure {
 
 message ResourceExhaustedFailure {
     temporal.api.enums.v1.ResourceExhaustedCause cause = 1;
+    temporal.api.enums.v1.ResourceExhaustedScope scope = 2;
 }
 
 message SystemWorkflowFailure {