diff --git a/backend/src/media/media.service.ts b/backend/src/media/media.service.ts
index fa805d590..6d17b12a7 100644
--- a/backend/src/media/media.service.ts
+++ b/backend/src/media/media.service.ts
@@ -196,7 +196,7 @@ export class MediaService {
   }
 
   private chooseBackendType(): BackendType {
-    switch (this.mediaConfig.backend.use) {
+    switch (this.mediaConfig.backend.use as string) {
       case 'filesystem':
         return BackendType.FILESYSTEM;
       case 'azure':