diff --git a/runtime/test-runtime/src/genesismap.rs b/runtime/test-runtime/src/genesismap.rs
index 9ab33e8e414a..f3ae9693d149 100644
--- a/runtime/test-runtime/src/genesismap.rs
+++ b/runtime/test-runtime/src/genesismap.rs
@@ -46,7 +46,10 @@ impl GenesisConfig {
 
 	pub fn genesis_map(&self) -> Storage {
 		// Assimilate the system genesis config.
-		let mut storage = Storage { top: BTreeMap::new(), children: self.extra_storage.children.clone()};
+		let mut storage = Storage {
+			top: BTreeMap::new(),
+			children_default: self.extra_storage.children_default.clone(),
+		};
 		let config = crate::GenesisConfig {
 			system: Some(system::GenesisConfig {
 				changes_trie_config: self.changes_trie_config.clone(),
diff --git a/service/res/westend.json b/service/res/westend.json
index 97e85d6bb7ee..9431671e1ca6 100644
--- a/service/res/westend.json
+++ b/service/res/westend.json
@@ -123,7 +123,7 @@
         "0xc2261276cc9d1f8598ea4b6a74b15c2f218f26c73add634897550b4003b26bc637af01a62f70176413143d943b7d30b9aebb0211dbb07b4d335a657257b8ac5e53794c901e4f616d4a254f2490c43934": "0x047374616b696e672000407a10f35a0000000000000000000002",
         "0x5f3e4907f716ac89b6347d15ececedcaad811cd65a470ddc5f1d628ff0550982b4def25cfda6ef3a00000000": "0x00000000"
       },
-      "children": {}
+      "childrenDefault": {}
     }
   }
 }