diff --git a/.changeset/silly-cycles-tan.md b/.changeset/silly-cycles-tan.md
new file mode 100644
index 0000000000..517ce526ea
--- /dev/null
+++ b/.changeset/silly-cycles-tan.md
@@ -0,0 +1,6 @@
+---
+'@backstage/plugin-kubernetes-backend': patch
+---
+
+Add `kubernetes.clusterLocatorMethods[].clusters[].customResources` to the configuration schema.
+This was already documented and supported by the plugin.
diff --git a/plugins/kubernetes-backend/config.d.ts b/plugins/kubernetes-backend/config.d.ts
index 777a3392db..d6c5f1d32b 100644
--- a/plugins/kubernetes-backend/config.d.ts
+++ b/plugins/kubernetes-backend/config.d.ts
@@ -68,6 +68,11 @@ export interface Config {
             caData?: string;
             /** @visibility secret  */
             caFile?: string;
+            customResources?: Array<{
+              group: string;
+              apiVersion: string;
+              plural: string;
+            }>;
           }>;
         }
       | {