diff --git a/build/config/substation.libsonnet b/build/config/substation.libsonnet
index e2136435..d140ee55 100644
--- a/build/config/substation.libsonnet
+++ b/build/config/substation.libsonnet
@@ -412,7 +412,7 @@
           settings: std.prune(std.mergePatch(default, $.helpers.abbv(settings))),
         },
         set(settings={}): {
-          local default = $.transform.enrich.kv_store.default { ttl_key: null, ttl_offset: null },
+          local default = $.transform.enrich.kv_store.default { ttl_key: null, ttl_offset: "0s" },
 
           type: 'enrich_kv_store_set',
           settings: std.prune(std.mergePatch(default, $.helpers.abbv(settings))),
diff --git a/transform/enrich_kv_store_set.go b/transform/enrich_kv_store_set.go
index 396fc13b..7510fef3 100644
--- a/transform/enrich_kv_store_set.go
+++ b/transform/enrich_kv_store_set.go
@@ -89,6 +89,10 @@ func newEnrichKVStoreSet(_ context.Context, cfg config.Config) (*enrichKVStoreSe
 		return nil, fmt.Errorf("transform: enrich_kv_store_set: %v", err)
 	}
 
+	if conf.TTLOffset == "" {
+		conf.TTLOffset = "0s"
+	}
+
 	dur, err := time.ParseDuration(conf.TTLOffset)
 	if err != nil {
 		return nil, fmt.Errorf("transform: enrich_kv_store_set: %v", err)