diff --git a/.changeset/clever-numbers-impress.md b/.changeset/clever-numbers-impress.md
new file mode 100644
index 0000000000..feb1a0438c
--- /dev/null
+++ b/.changeset/clever-numbers-impress.md
@@ -0,0 +1,5 @@
+---
+'@backstage/backend-defaults': patch
+---
+
+Fixed an issue where the `useRedisSets` configuration for the cache service would have no effect.
diff --git a/packages/backend-defaults/src/entrypoints/cache/CacheManager.ts b/packages/backend-defaults/src/entrypoints/cache/CacheManager.ts
index 41fe595123..a54959f155 100644
--- a/packages/backend-defaults/src/entrypoints/cache/CacheManager.ts
+++ b/packages/backend-defaults/src/entrypoints/cache/CacheManager.ts
@@ -147,7 +147,9 @@ export class CacheManager {
     let store: typeof KeyvRedis | undefined;
     return (pluginId, defaultTtl) => {
       if (!store) {
-        store = new KeyvRedis(this.connection);
+        store = new KeyvRedis(this.connection, {
+          useRedisSets: this.useRedisSets,
+        });
         // Always provide an error handler to avoid stopping the process
         store.on('error', (err: Error) => {
           this.logger?.error('Failed to create redis cache client', err);