diff --git a/bin/light-base/src/json_rpc_service.rs b/bin/light-base/src/json_rpc_service.rs
index eb09bd3eb1..8a02ee799e 100644
--- a/bin/light-base/src/json_rpc_service.rs
+++ b/bin/light-base/src/json_rpc_service.rs
@@ -1105,7 +1105,7 @@ impl<TPlat: Platform> Background<TPlat> {
                 follow_subscription,
                 hash,
                 key,
-                child_key,
+                child_trie,
                 network_config,
             } => {
                 self.chain_head_storage(
@@ -1114,7 +1114,7 @@ impl<TPlat: Platform> Background<TPlat> {
                     &*follow_subscription,
                     hash,
                     key,
-                    child_key,
+                    child_trie,
                     network_config,
                 )
                 .await;
diff --git a/bin/light-base/src/json_rpc_service/chain_head.rs b/bin/light-base/src/json_rpc_service/chain_head.rs
index 8f577f3eca..6f31ede9c5 100644
--- a/bin/light-base/src/json_rpc_service/chain_head.rs
+++ b/bin/light-base/src/json_rpc_service/chain_head.rs
@@ -863,7 +863,7 @@ impl<TPlat: Platform> Background<TPlat> {
         follow_subscription: &str,
         hash: methods::HashHexString,
         key: methods::HexString,
-        child_key: Option<methods::HexString>,
+        child_trie: Option<methods::HexString>,
         network_config: Option<methods::NetworkConfig>,
     ) {
         let network_config = network_config.unwrap_or(methods::NetworkConfig {
@@ -872,7 +872,8 @@ impl<TPlat: Platform> Background<TPlat> {
             total_attempts: 3,
         });
 
-        if child_key.is_some() {
+        if child_trie.is_some() {
+            // TODO: implement this
             self.requests_subscriptions
                 .respond(
                     &state_machine_request_id,
@@ -880,7 +881,7 @@ impl<TPlat: Platform> Background<TPlat> {
                         request_id,
                         json_rpc::parse::ErrorResponse::ServerError(
                             -32000,
-                            "Child key storage queries not supported yet",
+                            "Child trie storage queries not supported yet",
                         ),
                         None,
                     ),
@@ -888,7 +889,7 @@ impl<TPlat: Platform> Background<TPlat> {
                 .await;
             log::warn!(
                 target: &self.log_target,
-                "chainHead_unstable_storage with a non-null childKey has been called. \
+                "chainHead_unstable_storage with a non-null childTrie has been called. \
                 This isn't supported by smoldot yet."
             );
             return;
diff --git a/bin/wasm-node/CHANGELOG.md b/bin/wasm-node/CHANGELOG.md
index 65e0f49e70..9e28427454 100644
--- a/bin/wasm-node/CHANGELOG.md
+++ b/bin/wasm-node/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+### Changed
+
+- The `childKey` parameter of the `chainHead_unstable_storage` JSON-RPC function has been renamed to `childTrie` in accordance to the latest specification changes. ([#2994](https://github.com/paritytech/smoldot/pull/2994))
+
 ## 0.7.6 - 2022-11-04
 
 ### Fixed
diff --git a/src/json_rpc/methods.rs b/src/json_rpc/methods.rs
index 63be322252..529e60ae51 100644
--- a/src/json_rpc/methods.rs
+++ b/src/json_rpc/methods.rs
@@ -434,7 +434,7 @@ define_methods! {
         #[rename = "followSubscription"] follow_subscription: Cow<'a, str>,
         hash: HashHexString,
         key: HexString,
-        #[rename = "childKey"] child_key: Option<HexString>,
+        #[rename = "childTrie"] child_trie: Option<HexString>,
         #[rename = "networkConfig"] network_config: Option<NetworkConfig>
     ) -> Cow<'a, str>,
     chainHead_unstable_unfollow(