diff --git a/src/utils/composeReducers.js b/src/utils/composeReducers.js
index e93887fabf..4d654ecfbe 100644
--- a/src/utils/composeReducers.js
+++ b/src/utils/composeReducers.js
@@ -4,9 +4,9 @@ import pick from '../utils/pick';
 export default function composeReducers(reducers) {
   const finalReducers = pick(reducers, (val) => typeof val === 'function');
 
-  return function Composition(atom = {}, action) {
+  return function composition(state = {}, action) {
     return mapValues(finalReducers, (store, key) =>
-      store(atom[key], action)
+      store(state[key], action)
     );
   };
 }