diff --git a/crates/rpc/rpc-types/src/eth/trace/parity.rs b/crates/rpc/rpc-types/src/eth/trace/parity.rs
index 8158abbfce..3c4b0bc57c 100644
--- a/crates/rpc/rpc-types/src/eth/trace/parity.rs
+++ b/crates/rpc/rpc-types/src/eth/trace/parity.rs
@@ -223,8 +223,8 @@ pub enum TraceOutput {
 pub struct TransactionTrace {
     #[serde(flatten)]
     pub action: Action,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub error: Option<String>,
-    #[serde(flatten, skip_serializing_if = "Option::is_none")]
     pub result: Option<TraceOutput>,
     pub subtraces: usize,
     pub trace_address: Vec<usize>,