diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index fa8feda1f..634d6e1f1 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,6 +1,9 @@
 Release Notes
 =============
 
+## 1.9.15
+* ACA: Add required namespace field to sbus scale rule
+
 ## 1.9.14
 * VMSS, AKS, Azure Firewall, Managed Clusters (AKS): Adds `pick_zones` to let ARM select the availability zones.
 * AKS: Remove deprecated `docker_bridge` from Container Services (AKS).
diff --git a/src/Farmer/Arm/App.fs b/src/Farmer/Arm/App.fs
index dcb613cc6..ac87b533d 100644
--- a/src/Farmer/Arm/App.fs
+++ b/src/Farmer/Arm/App.fs
@@ -381,6 +381,7 @@ type ContainerApp = {
                                                 metadata = {|
                                                     queueName = settings.QueueName
                                                     messageCount = string settings.MessageCount
+                                                    ``namespace`` = settings.Namespace
                                                 |}
                                                 auth = [|
                                                     {|
diff --git a/src/Farmer/Common.fs b/src/Farmer/Common.fs
index ff00ef2ea..1536e9218 100644
--- a/src/Farmer/Common.fs
+++ b/src/Farmer/Common.fs
@@ -4026,6 +4026,7 @@ module ContainerApp =
 
     type ServiceBusScaleRule = {
         QueueName: string
+        Namespace: string
         MessageCount: int
         SecretRef: string
     }
diff --git a/src/Tests/ContainerApps.fs b/src/Tests/ContainerApps.fs
index 1cb78c9be..b99e22f33 100644
--- a/src/Tests/ContainerApps.fs
+++ b/src/Tests/ContainerApps.fs
@@ -117,6 +117,7 @@ let fullContainerAppDeployment =
                     QueueName = "wishrequests"
                     MessageCount = 5
                     SecretRef = "servicebusconnectionkey"
+                    Namespace = "servicebus"
                 }
             }
             containerApp {