diff --git a/temporal/api/namespace/v1/message.proto b/temporal/api/namespace/v1/message.proto
index dd864df10..1af959077 100644
--- a/temporal/api/namespace/v1/message.proto
+++ b/temporal/api/namespace/v1/message.proto
@@ -40,6 +40,8 @@ message NamespaceInfo {
         bool reported_problems_search_attribute = 5;
         // True if the namespace supports pausing workflows
         bool workflow_pause = 6;
+        // True if the namespace supports standalone activities
+        bool standalone_activity = 7;
     }
 
     // Namespace configured limits