diff --git a/tiered_cache.go b/tiered_cache.go
index 39ac88d3f4..46c00c4ccb 100644
--- a/tiered_cache.go
+++ b/tiered_cache.go
@@ -173,7 +173,8 @@ func getSmartTieredCache(api *API, ctx context.Context, rc *ResourceContainer) (
 	uri := fmt.Sprintf("/zones/%s/cache/tiered_cache_smart_topology_enable", rc.Identifier)
 	res, err := api.makeRequestContext(ctx, http.MethodGet, uri, nil)
 	if err != nil {
-		if err.Error() == notFoundError {
+		var notFoundError *NotFoundError
+		if errors.As(err, &notFoundError) {
 			return TieredCache{Type: TieredCacheOff}, nil
 		}
 		return TieredCache{Type: TieredCacheOff}, err