diff --git a/.changeset/eighty-sheep-occur.md b/.changeset/eighty-sheep-occur.md
new file mode 100644
index 000000000000..26941c724680
--- /dev/null
+++ b/.changeset/eighty-sheep-occur.md
@@ -0,0 +1,5 @@
+---
+'@data-client/core': patch
+---
+
+internal: Simplify fetchReducer code
diff --git a/packages/core/src/state/reducer/fetchReducer.ts b/packages/core/src/state/reducer/fetchReducer.ts
index 9727be0d7c78..769666335f18 100644
--- a/packages/core/src/state/reducer/fetchReducer.ts
+++ b/packages/core/src/state/reducer/fetchReducer.ts
@@ -10,10 +10,7 @@ export function fetchReducer(state: State<unknown>, action: FetchAction) {
   let setAction: SetResponseAction | OptimisticAction;
 
   if (action.endpoint.getOptimisticResponse && action.endpoint.sideEffect) {
-    setAction = createOptimistic(action.endpoint, {
-      args: action.meta.args,
-      fetchedAt: action.meta.fetchedAt,
-    });
+    setAction = createOptimistic(action.endpoint, action.meta);
   } else {
     // If 'fetch' action reaches the reducer there are no middlewares installed to handle it
     /* istanbul ignore next */