diff --git a/config.default.yaml b/config.default.yaml
index 56e03a56e..224f5f237 100644
--- a/config.default.yaml
+++ b/config.default.yaml
@@ -84,7 +84,7 @@ cluster_options:
     remove_stubs_across_borders: true
     p_threshold_drop_isolated: 20 # [MW] isolated buses are being discarded if bus mean power is below the specified threshold
     p_threshold_merge_isolated: 300 # [MW] isolated buses are being merged into a single isolated bus if a bus mean power is below the specified threshold
-    s_threshold_fetch_isolated: 0.05 # [-] a share of the national load for merging an isolated network into a backbone network
+    s_threshold_fetch_isolated: false # [-] a share of the national load for merging an isolated network into a backbone network
   cluster_network:
     algorithm: kmeans
     feature: solar+onwind-time