diff --git a/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.test.js b/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.test.js
index 4e271c32f..e3a0c412f 100644
--- a/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.test.js
+++ b/ui/src/Components/Grid/AlertGrid/AlertGroup/Silence/index.test.js
@@ -62,6 +62,7 @@ beforeEach(() => {
     instances: [
       {
         name: "default",
+        cluster: "default",
         uri: "file:///mock",
         publicURI: "http://example.com",
         error: "",
@@ -187,6 +188,7 @@ describe("<Silence />", () => {
     const am = instance.getAlertmanager();
     expect(am).toEqual({
       name: "default",
+      cluster: "default",
       uri: "file:///mock",
       publicURI: "http://example.com",
       error: "",
diff --git a/ui/src/Components/SilenceModal/AlertManagerInput/index.test.js b/ui/src/Components/SilenceModal/AlertManagerInput/index.test.js
index 053baef9c..17c9a84f7 100644
--- a/ui/src/Components/SilenceModal/AlertManagerInput/index.test.js
+++ b/ui/src/Components/SilenceModal/AlertManagerInput/index.test.js
@@ -25,6 +25,7 @@ beforeEach(() => {
       publicURI: "http://am1.example.com",
       error: "",
       version: "0.15.0",
+      cluster: "am1",
       clusterMembers: ["am1"]
     },
     {
@@ -33,6 +34,7 @@ beforeEach(() => {
       publicURI: "http://am2.example.com",
       error: "",
       version: "0.15.0",
+      cluster: "am2",
       clusterMembers: ["am2"]
     },
     {
@@ -41,6 +43,7 @@ beforeEach(() => {
       publicURI: "http://am3.example.com",
       error: "",
       version: "0.15.0",
+      cluster: "am3",
       clusterMembers: ["am3"]
     }
   ];
@@ -147,6 +150,7 @@ describe("<AlertManagerInput />", () => {
       publicURI: "http://am1.example.com/new",
       error: "",
       version: "0.15.0",
+      cluster: "am1",
       clusterMembers: ["am1"]
     };
     // force update since this is where the mismatch check lives
diff --git a/ui/src/Components/SilenceModal/SilenceSubmit/SilenceSubmitProgress.test.js b/ui/src/Components/SilenceModal/SilenceSubmit/SilenceSubmitProgress.test.js
index 426673055..264ded049 100644
--- a/ui/src/Components/SilenceModal/SilenceSubmit/SilenceSubmitProgress.test.js
+++ b/ui/src/Components/SilenceModal/SilenceSubmit/SilenceSubmitProgress.test.js
@@ -19,6 +19,7 @@ beforeEach(() => {
         publicURI: "http://example.com",
         error: "",
         version: "0.15.0",
+        cluster: "mockAlertmanager",
         clusterMembers: ["mockAlertmanager"]
       }
     ]
diff --git a/ui/src/Models/API.js b/ui/src/Models/API.js
index 9f837e44f..d21ef96dd 100644
--- a/ui/src/Models/API.js
+++ b/ui/src/Models/API.js
@@ -66,6 +66,7 @@ const APISilence = PropTypes.exact({
 
 const APIAlertmanagerUpstream = PropTypes.exact({
   name: PropTypes.string.isRequired,
+  cluster: PropTypes.string.isRequired,
   uri: PropTypes.string.isRequired,
   publicURI: PropTypes.string.isRequired,
   error: PropTypes.string.isRequired,
diff --git a/ui/src/__mocks__/Alerts.js b/ui/src/__mocks__/Alerts.js
index 19e8c5077..82b74eb77 100644
--- a/ui/src/__mocks__/Alerts.js
+++ b/ui/src/__mocks__/Alerts.js
@@ -66,6 +66,7 @@ const MockSilence = () => ({
 
 const MockAlertmanager = () => ({
   name: "default",
+  cluster: "default",
   uri: "http://localhost",
   publicURI: "http://am.example.com",
   error: "",